Hi. I seriously don't want to sound like a nerd, but under the ctrl panel, where you can change your biography it says "No HTML allowed." but what I don't understand is that almost everyone does have HTML in their bio. So... I don't know. I'm starting to think this thread is pointless and I just like to report random things. . . Oh and here is an image for those who don't want to look yourselves :P
What? There has to be HTML (or some type of web language to make anything visible) but you can't implement HTML code yourself using the biography. And no, nobody has a single piece of operating HTML in their biography, all the links are made using BBCode (Board Bulletin Code) which is made specifically for forums and biographies and the such.
I believe you're thinking of links. They are not HTML, they are BBCode (The same stuff as in the forums). I believe it is also possible to implement pictures this way (Look at crimson's guide).
If you see someone using HTML code, report it immediately to a mod.