For some folks that probably isn't too negative, but for me becoming part of a real life religious community has encouraged me to make many more life changes than I ever would have embarked on just hangin' out out the Cauldron.
For some of us (i.e. the solitary-by-necessity ones) I think it's "not too negative" because we already know that there's not really an offline religious community of the type we would desire within reach.

(I would just laugh my ass off in sheer shock and amazement if my town actually turned out to have a Hellenic community, for example.) But in cases where such a thing is available, I can see where that would be a downside of Internet religious interaction. It's easy to get involved with an online place like TC, get comfy there, and not want to change things.