Cockanoid (noun)- Subsect of troll.  A low key keyboard warrior who uses politics and/or moral righteousness in order to generate confrontation or to bully publicly.   

The cockanoid conflates bullying with moral righteousness or political affiliations.   This is easily done by inserting rude and degrading personal attacks/comments into long winded, political, or morally righteous diatribes.

Internet Troll (noun)- "people who leave intentionally provocative or offensive messages on the internet in order to get attention, cause trouble or upset someone."