Or are they doing it to amuse themselves while eroding civil discourse? :^)
Are Right-Wing Libertarian Internet Trolls Getting Paid to Dumb Down Online Conversations? | Media | AlterNet
"Articles about the environment are hit harder by such tactics than any others. I love debate, and I often wade into the threads beneath my columns. But it’s a depressing experience, as instead of contesting the issues I raise, many of those who disagree bombard me with infantile abuse, or just keep repeating a fiction, however often you discredit it. This ensures that an intelligent discussion is almost impossible - which appears to be the point."
Not that this sort of thing happens here. ;^)