if you have friends and family that use things hurting their privacy, morally, it would be good thing to at least warn them and explain why it's bad thing to do.
If they don't listen - well, their problem.
But it doesn't mean you must jump into acid pool, just because everyone else is doing it.
Personally, I respect others decision to sue whatever crap they like, but I also demand them to respect my choice of using different things. So, if they want to contact me, nothing stop them from signing up on jabber - I'll gladly help with the process.
Someone, who would be above to sign-up in transparent and privacy-safe service to stay in touch with me - because he is too used to skype/whatsapp/whatever, and ignore fact that not everyone like giving their privacy away for free - could hardly be called a friend.
I don't need to mention that often, after getting accustomed with FOSS tools even if just to stay in touch with me, such person gradually stops using crappy services, and starts convincing others to do it "right way"?