Comment is free....

Interesting pieces on Comment is Free this week from George Monbiot (on the Unions and the Labour Party) and Derek Wall (on Jeremy Clarkson's latest antics). Also a (perhaps uncharacteristically restrained) piece from Tony Greenstein (on Littlejohn's programme on anti-semitism) and an article by Graham Smith of Republic (on the Royals and the media.)
All four pieces set the resident right-wing trolls raging. What is it about right-wing trolls that draws them day after day to a site attached to Britain's foremost "liberal" (in the US sense) organ?
Is there any equivalent 'left' infestation on right wing bulletin boards and media sites?