I had a friend - well, call him one. Our relationship went worse and worse because of his never-agreeing attitude, and eventually, I had to block him.
He's still active on my community's FB page, though, and exploits it. He's trolling - not in the flooding manner, but rather "for the lulz" - I think so at least. He does that very rarely (maybe once a month), so it's not necessarily irritating, but here's something I don't know how to deal with.
The way he's trolling is extremely offensive, mocking my ideology ("ur a liberal trash thus u r a quisling" and such) and recently he has even made similarly rude statement about my girlfriend.
My question is: should I take it seriously? I mean, I'm aware that trolls tend to be extremely offensive very often (questioning basic values to piss off people), but my common sense says that when someone goes beyond a certain border, then I should take heavier measures - such as writing a post about what not to say, where are these borders, and such.
Should I do so, or just ignore him like every ordinary trolls?