Many parishes made up of former HOOM (now CSB) parishes were part of the Archdiocese of Vasiloupolis (Metropolitain PANGRATIOS) until about 2000. Many were then received by the Serbian and Bulgarian Orthodox respectfully. I should know as the parish I attend is a former HOOM mission. I was never connected with HOOM as I joined only in the late '90s being a convert from the Catholic church. I'll also be on record as not being or having been a member of CSB, only the parish. Now, that being said....
The HOOM was a monastic/semi-monastic organisation. The members were "ordained" clerics, and also took monastic vows. After the dissolusion of HOOM and the entry of the majority into Orthodoxy, many of these people maintained the simpler, plain, old fashioned lifestyle they had grown accoustomed to. Also, the HOOM, was very much drawn to the mystical side of religion, and this is what attracted many to Orthodoxy.... its mystical side. They were introduced to Orthodoxy by Fr Herman Podmoshensky (former ROCOR, now Serbian monk), thus they were given to the monastic "side" of Orthodoxy rather than the lay/parish "side". This may explain why some people feel a sense of cultishness associated with CSB parishes. Yes, there were some "characters", and problems within the HOOM, but that isn't useful or relevant to the point at hand.
While I am familiar with the St Innocent Academy, I have not heard of this incident regarding the girl (so I can't in fairness comment directly). As for being told who you should have or not have as friends, this strikes me as overboard and unfortunate. Both of these incidents seem to me over zealousness, which all people, myself included are prone to at times. Yes, I have seen the mentioned simple plain dress on some in my parish, but not all.
In my parish, many who dress plainly for church, are dressed different when I have seen them outside the church setting. Many dress (especially the youth) fairly modern, yet keeping it modest. Example: We have one boy who dresses up properly up for liturgy, but when I get to the church hall for refreshemnts he is usually in shorts, t-shirt and plimsolls. Like any Orthodox parish, I think it may vary... some are more "plain folk" than others. I must say however, that my parish has definitely changed and become more open, while maintaining a healthy modesty and traditionalism, meeting the world, ocassionally "dancing with it", yet not fully embracing it either. To me that is Christian and healthy. We are to live in the world, but yet not be of it. Orthodoxy provides exactly this path.
Also, some people choose the old fashioned or simple for personal reasons or likes unrelated to religion, like myself. I must admit though that while religion (not Orthodoxy initially) had some inspiration in this regard it wasn't the full reason. In the last year, I have moderated my stance in some areas, trying to find a happy medium between the traditional and modern. Not as easy as I thought.
That is my parish as it currently stands. I can't really speak for life in other CSB parishes, as I have visited relatively few (of any Orthodox churches, actually), being I haven't had a car until recently. Most other former HOOM people I know are clergy and monastics, so that wouldn't be a fair assessment of laymen or parish life.
A personal aside: When I first came to my parish, the semi-monastic flavour was very strong, and I felt that I had to live this way to be Orthodox. I actually did the "great purge" and rid my flat of all things that didn't exist prior to the advent of modernity. I even cut the breakers and used hurricane lamps. I kept the cooker and refrigerator running as I had no other good options for food storage and prep. I burnt out completely after three weeks and left Orthodoxy for a short time. It took me over a year to restore what I discarded. When I spoke to my priest about this he told me I am not a monastic, and shouldn't try to be one. He also informed me that Orthodoxy doesn't forbid the use of modern appliances and technology, including television and multimedia. He simply advised prayer, discernment, and a healthy moderation. He also advised me to be about my spiritual and temporal needs, and not worry about what other Orthodox are doing or not doing, think or don't think. He informed me there is no Orthodox "secret police". Now when someone at my parish gives this type of "directive", I take it only as opinion or advise, and not a direct order.
I'm sorry if some have had a bad experience at a CSB parish, or felt out of place.... it happens at other Orthodox parishes as well. I know this from a personal expierience. Hopefully the above information will be of help in understanding why these good people are the way they are.
Despite their shortcomings, (as many have mentioned) the CSB have done much for Orthodoxy, not just in this country, but throughout the world, particularly in Russia.