jadarite: well - now i know at least a little more what you want.
how about creating non-BKR-games? if you resign them, they do not affect pointage or something else. and all people who want to play for more thrill wont accept those invitations.

now i am offering one more OTHER option, but i feel its because we are talking about sport here - and just cancelling games isnt that sporty. i am sure brainking is already offering a lot of nice - and easy to handle - opportunities to fulfill your needs! all the best...