So what is the official policy in matter of nicks like "albert_Titler" and similar ?
I doubt we'd ever censor words like "Albert" and "Titler", so it would depend on how the person acts, if he's disruptive towards the gameplay and other players, e.g. hate speech or similar to the "play on words" then serious action would be taken, which means it'd be more than just a regular names issue (he'd get serious ban time).
Overall I don't condone that name though and if it could be automatically prevented via systems then that would be preferable.
However the thing is that you want to make sure people can't use these sort of silly nicks but without censoring people who might be using words that otherwise would be seen as offensive, e.g. the word "tit" could easily be a part of a longer nickname etc.