If you create a forum board /site which is base on the city's name. but make fun of it like crazycity'sname.com or stupidcity'sname.com would authorities sue you for creating such?
As long as the information that you post is not maliciously damaging, or opinions are not presented as fact, you should be fine. Comedy and Satire are protected as such, but you cannot make false accusations that would otherwise damage business or slander people personally.
As long as you live in America or some other country that guarantees your rights to free speech you should be fine.
well, we're in a demo country. i just want to make sure. thank you guys. i now have someone to blame if ever we'll endup in prison