i had something similar to this on my forum acctually, it was a crude easter egg, by adding &leet=1337 onto the end of a url it converted the psots into 'leet' it wasn't great as it totally messed up the bb tags but it gave us a laugh for a few mins
i could have done something similar for binary i suppose... if i was going to acctually release taht as a hack i'd have to tidy up its parsing through bb tags which requires me to mess with the regex gah...