Don't start threads designed to attack other posters. Don't try to impersonate another poster by copying his or her username. Don't stalk another poster (i.e., don't follow that poster from thread to thread seeking to undermine or attack his or her comments).
Don't post personal information about another poster without their consent. Don't use the forums to out your fellow posters or to out the identity of someone referred to in a post.
Don't post the same thread in every forum. If you're unsure about where to post your thread, ask the moderators.
I didn't find the right solution from the Internet.