This anonymous games have been a popular idea and you can vote for it on user voice:
http://warlight.uservoice.com/forums/77051-warlight-features/suggestions/1095383-anonymous-gamesAlso if you're an experienced coder you can create your own ladders and tournaments with these settings as explained by Fizzer here:
http://blog.warlight.net/index.php/2012/12/announcing-custom-ladderstournaments-framework-clot/I don't however believe there's a method to hide the difference between Humans and AI.