Well you generally don't want to absorb any more surround energy than you have to. It kind of defeats the purpose. While I don't think it's going to cause any serious issues what about covering the bass traps with a thin sheet of some type of covering. I did this with mine (picked up a 1/8" thick piece of sheeting at HD and wrapped with GOM) for the same thing. The bass will definitely still be absorbed, while allowing the upper frequencies (surround information) to reflect.
Psychotic Episode Averted