I see now that I have slightly misinterpreted the reasons.
I thought that what you meant by "block such nonsense" was any/all extra information appended to node titles. But now I see you're talking about weird characters that can cause trouble traveling through the various code sections to get displayed.
My original node still stands; I still believe that people have all the right to put what they want in the title as long as there is a textfield allowing them to do so, and PM has all the right to remove illegal characters or entities from these titles.
He who asks will be a fool for five minutes, but he who doesn't ask will remain a fool for life.
Chady | http://chady.net/