One who is not particularlyintelligent who occupies chat rooms or posts in forums who constantly takes intellectual bait and runs wild with it like a mindless idiot.
Social media friends who believe, and hold true all the beliefs their cheetoh leader demands, disregarding etiquette by trolling your page only to make provocative comments, and absolutes in forms of diatribes to bully you into submission.
"Did you see that alt right asshole on my sister's facebook talking about trump? What a trolltalitarian!!"
That blogger was totally a trollanthropist when he tried to help a poor, destitute grandma by raising GoFundMe money that wasn't wanted since it destroyed the political arguments and highlighted the opposition's hypocrisy.