Not how you conducted your 'research' but it obviously wasn't from studying Warden's current implementation, otherwise a single API hook would have proven your hypothesis to be incorrect.*
http://www.mmowned.com/forums/bots-p...-governor.html
* Protip: Dump Warden's 'imports' and check for yourself if you don't believe me. (Make sure you strip any 'dummy' entries)
At any rate, even if Warden did scan window titles, renaming your window like that would do very little.
Warden could simply use EnumWindows and then EnumChildWindows to identify your window. Or they could simply enumerate all running processes and perform memory hashing. etc etc
In short: Its a waste of time and offers effectively zero protection against Warden.