Can an ex-Orthodox Christian still receive communion? If they can't, then that sounds like a "consequence" to me.
I suppose it depends on a number of factors, including what is meant by "ex-Orthodox". Are we talking about someone who just stops going for a year and then shows up on Easter? In that case I don't know. If we're talking about someone that specifically makes a decision to leave the Church, then I would hope they'd have enough integrity to go through a process of reconciliation, though I don't know how individual priests might handle it.
I was thinking of the latter. (For the former I would tend to say lapsed
rather than ex
Not trying to change the subject, but I recall one or more ex-Catholic posters who still expected to be allowed to receive communion from Catholic ministers (I don't recall what thread this was on, or even whether it was on OCnet or a different forum).