HTC Thunderbolt / Accidental Answer

Anybody know how to change the slide to answer option and add something that helps prevent the phone from being answered accidentally while pulling it from your pocket. I have this problem often. I will pull my phone from my pocket to see if its a client and accidentally answer a sales call.

I think if I had an option for a second swipe or password to answer it would solve this.

 

Thanks Dan.
I will try that.