I know that misusing HTML can crash the site, so we could have some limitations on what kind of coding we could use (for example, we could only be allowed to use background, text color, text size and font, typewriter text... the basic stuff only.)
Well, you can use bold, italics, underline, and strikethrough. I hate bbcode, i would like to avoid it if at all possible. I could maybe add a few more tags.