Anyone can hit the Report Abuse button and there are just too many for them to review. You have to keep on top of the trolls; obviously he/she is just switching IP addresses so the sooner you alert them the sooner they can take action.
Ignore any posts from this clown with the Minnesota ISP. He is nothing but a vulgar, hateful individual. He uses several different names. If you see his ISP from Minnesota, just ignore his comments. Additionally, you can click on "report Abuse" to have his ridiculous rants removed from this forum.