Sony never made it apparent that they didn't want to patch it, they have the patch ready (just like MS) and will update MW2 whenever IW has the next title update. However, Sony made it apparent that they weren't going to ban those who were using the glitch.
The only way they're going to solve the problem is to grow a pair and release a patch that stops players from performing the glitch. Just banning people won't do anything. They'll get a new account, then do it some more.