BB Torch 9800 :: Way To Keep Phone Locked In Pocket

I went to the store yesterday to play with the torch. I like it a lot and will probably upgrade from my 9000. however, I dont like the lock (rather, the unlock) and the sales guy said he didn't know of an answer for me.

in short, you lock it by hitting the button on the top left. no worries. however, to unlock, you either open the slider or hit the lock button again. this is not a very "positive" way of unlocking, if you ask me. its quick and easy, but not a very good way to keep the phone locked in your pocket or whatever. I can easily see me bumping the unlock button when the phone's in my pocket and dialing or browsing or any number of functions from touch enable home screen. I dont think the slide is likely to open in a cargo pocket, but the button could definetely get pushed. for those of yall that have had one for a while, am I missing something? is there a way to "override" this and make it so it only unlocks when you manually do something?