Images in posts also come under the langauge rules.
Rule 3 No bad language, racism, or other downright 'orrible stuff. The quickest way to find out if a word is allowed or not is to include it in a posting, and if the auto censor gets it, it is not allowed.
Re-spelling or doctoring a word to get it past the censor does NOT suddenly make the word allowable.
Rule 3 also covers Personal Attacks. Attack the post but not the poster.