I never use them but there are some Q&A sites that have little or no spam and I sure haven't seen any trolls on them.
I don't think that social networks are safe from spammers and trolls.
Remember, "good things" will attract "bad elements" too.
"errrrr" no but I know one with shit hot moderation where the spammers and Trolls are sent on their way causing as little disruption to members as is possible lolz
Yep, there have been some marked improvements of late.