Avoid posting the same information on multiple boards, which just creates confusion for replies. If warnings are ignored, off-topic posts may be deleted. If it continues to be a problem offending user will be banned. Be courteous to other users. If you are old enough to have a driver's license, you are old enough to be polite and respect others' opinions.
Controversy is welcome as long as everybody remains reasonably civil and mature.
If you have a violent disagreement with someone, take it to private email. Flame wars will be deleted. Do not swear or post offensive pictures. Repeat offenders may be subject to Temporary or Permamant banning. 3. Expect differing opinions.