For starters don't go on witch hunts or be overly suspicious of these kind of things. If someone comes right out and admits they are some kind of heretic, there you have it. Other than that, on the internet just engage the issues at hand and try to argue dispassionately using sound theology, history, ethics logic, and things like that. If on the internet all you have is words to argue and reason with, that's the best way to bring to light true vs false doctrine and worship.
Ok, so in a real world scenario (Actually in The Orthodox Church Building) how do you guys deal with these people ?
About the "Online" comment. When someone has a "Luciferian Theosophy Logo" in their Avatar or a picture of a chick doing "One Eye Symbolism" it's pretty obvious and blatant that they are trying to mock true Christians on the forum.
if you have concerns about specific members, you can request access to the private forum and denounce them, which is a bit boorish, or you can talk to the mods, which is probably the proper thing to do.
BTW lest my avatar be interpreted as an occult symbol; my tongue-in-cheek username refers to Alpha 60, the villain from the French New Wave film Alphaville, a malevolent computer that I believe inspired the character of HAL-9000 in 2001: A Space Odyssey (HAL was originally to be a robot, and not a stationary "mainframe" computer like Alpha 60). The specific avatar I use is an emblem on the police cars of Alphaville, which replaces the letter "O" in the word POLICE.
Now, in the actual Orthodox church, Rasputin's presence and growing influence in the Orthodox Church alarmed both the seniormost bishops of the Russian Orthodox Church and the pious members of the laity who were numbered among the courtiers of St. Nicholas. In the end, a group of noblemen killed him, in a brutal murder which the Church cannot and should not justify.
However, I am certain that he was excommunicated and anathematized years before; the bishops of the Holy Synod risked the wrath of the Czar, or more specifically, his wife, but refused to call him a monk, referring to him as a "cassock bearer."
Practically speaking, regarding members of the Church, if someone starts turning up in church wearing obviously occult jewelry, like Pentagons, an observant priest will llkely have a talk with them. They might be denied communion.
On one of John Sandfipoulous's blogs there was a lovely story about the conversion of two Gothic occultist teenage boys, one of whom introduced himself to the Priest as Satan. Through loving-kindness, the Priest rather than driving them out welcomed them, and showed them love, and the boy who called himself Satan returned to using his real baptismal name, and acquired piety, and the two boys were brought into the loving participation in the Church.
We are not the Puritans of Boston. Our goal is not to hunt witches and burn them at the stake, but to call them to repentance, literally, metanoia, in Greek, which means, "to change your mind." We want them to change their mind about the occult, to reject it and instead embrace the Gospel of Christ, the Apostolic faith. We want to convert them to Holy Orthodoxy and save their souls.
Many people who dabble in the occult experience demonic harasssment or other problems (see fatheralexander.org, which has a good collection of articles on this subject by the late ROCOR Bishop Alexander Mileant, may his memory be eternal). We can exorcise these demons through baptism or Chrismation.
Demons take flight at the sign of the cross. Christ has risen, and they are overthrown, now, always and forever.
Praise be to God, Father, Son and Holy Ghost.