I hope that congregation shrinks. Hopefully, they will start having boasting session attendances down 90%, field circus down 90%, and something like 3/4 of them disassociating themselves or committing "brazen conduct" by remaining on Facebook. Yes, the Filthful and Disgraceful Slavebugger does warn the witlesses about social networks. However, I have seen quite a few active witlesses on MySpace getting involved in discussions with apostates--and the witlesses never seem to give in to reason.
And, if your faith is so damn wimpy that a social network is sufficient to wreck it, something is seriously wrong with it. Their own Bible says that a solid faith cannot easily be damaged--for sure, not with something so wimpy as being exposed to a different faith.