When people say "Ignore" to me is one of the most ignorant things possible. in the same way that if you ignore a bully, that's not going to stop them from bullying you. In fact its going to give them more incentive to keep bullying, or this case, a troll to keep trolling. You ignoring them is only a sign that you're willing to take the abuse without question.
And you all frankly shouldn't.
I'm on another forum and whenever we have trouble with trolls or questionable posters, we IP ban them and get them off the forum. Because ignoring them doesn't do anything, they are going to keep posting, they are going to be poisonous to the forum and until they are dealt with, they will keep causing problems.
If anyone is having legitimate concerns for such an issue, talk to staff or something. I assume Tapastic has something to deal with unruly posters.