It is quite customary on just about every forum in the world that users can quote their own website URL/ IRC channel in signatures. If it was to be banned here in the name of rigidly enforcing the advertising rule then it would be the first forum in the world to do so.

If this is the case, then aren't the rules very contradictive? It is alright to list what servers/channels you hang out at in your signature (which appears on every single post you make), but if you mention anywhere in the body of just one post the SAME exact information, it is considered advertising? Please! You can NOT justify the difference from posting "advertisements" (servers/channels you like to visit) in your signature versus making a post with the same information. This is just silly.