vBulletin said:HTML Code in posts
This allows users to use HTML while posting. It is strongly recommended that you DO NOT turn this on as it can severely compromise security and/or severely mess up layout if users insert malformed HTML. Even if you set this to Yes, users still cannot use certain tags, including javascript: and about:.
Does anyone have an opinion about this? I'd like to enable HTML codes, but I'm concerned about this warning from vBulletin. It seems to me there should be software to prevent problems using HTML.