Android :: Working Lock App

Im having a problem where my eris answers calls when its in my pocket. I carry my phone in my front pocket and any lock app that Ive tried does not keep it from answering in my pocket. the default slider lock doesnt work, its simply way too easy to move the slider down, especially while in your pocket. if the phone stops ringing before you slide it down, the screen is still activated with a missed call notification, so the slider is still there. the pattern lock isnt an option because it doesnt apply to incoming calls.

A lot of these lock apps just dont work because you can unlock them by hitting the soft keys, or they dont apply to incoming calls. is there a lock app that only works with the hard keys or the trackball?

Im looking for a lock app that will replace the default slider so I cant activate it in my pocket and that will keep it locked down after a missed call. any developers out there interested in working on this? I think something similar to the iphone slider would work, as long as it applies to incoming calls and cant be unlocked with any other key.