That's BS. They don't want to know who your having a conversation with. It's not like they're asking everyone to turn in their list of friends, for god's sake. You are so obsessed with crying "controlling cult" that you don't know what you're talking about. Privacy is a real issue and if you don't realize that, then you're a fool. Does the organization tell us not to associate with non jws? Actually, they don't prohibit it, but encourage us to only have necessary dealings. Is that really so wrong? That's exactly what Jehovah told the Israelites, so your problem is bigger than the organization. You're problem is with Jehovah himself.
Actually, I agree with you on some of this. I highly doubt any elder was in the audience jotting down the names of those who raised their hands, and yes I'm under the impression that some on this particular thread are a little trigger happy when it comes to seeking an issue worth criticising the WT/JWs on. The brother probably requested those with FB accounts raise their hands for illustrative purposes to emphasize just how prevalant(not necessarily in a negative way) online social networking is.
I will say however that when you say the WT doesn't prohibit association with non-JWs, and only encourages necessary dealings, you're not taking into account how that gets interpreted by their audience, and that's not an unintentional result either. One of the more recent WT Studies included after school clubs & sports as being tantamount to underreporting one's taxes, or being a liar. For the life of me I'd love for you to demonstrate how such a conclusion is scriptural.