"TCP/IP" is a suite of protocols that includes UDP. You're as stupid as those liberal arts wannabees around here if you didn't know that.
Now you change your story, referring to the Internet protocol suite stack, after you looked up UDP. I'm sorry you have to continually educate yourself in order to keep up in these technical discussions.
BTW, stuff does get through. IIRC, Anonymizer had some problems with Javascripting getting through to IE. Javascript is, after all, just text.