@Stuart Van Onselen

Just because someone posts anonymously, it doesn't mean they're trolling (although in this case, I think they are).

Sometimes it's because they know that their opinion is controversial and that they are likely to get some pretty unpleasant and vicious abuse instead of constructive counter-argument. To resort to abuse is an admission that you either can't or won't counter their argument. Neither option is helpful to the debate.

N.B. If you think somebody is trolling, DO NOT FEED THEM! They thrive on getting attention, regardless of whether it's positive or negative.