That may be a lot of coincidental things, but it has almost happened to me numerous times. I can't count the number of times I have pulled my phone out of my pocket to see it asking, "Are you sure you want to make an emergency call?" - and it really bugs me when the YES is highlighted! It's almost better to keep the keylock off, because then the chance of accidentally dialing an emergency number would be infinitely smaller. I've owned 2 blackberries over 2 years, and I've been dreading the day I accidentally call - especially because the phone will probably be in my pocket and I'll have no clue it has happened.
About a month ago, I'm watching TV and my 1 year old suddenly has my phone in her hands. I take it away quickly, and notice she's dialed someone's number. I hang it up. The Police Department calls me back and asks if everything is ok because they just received an emergency call, to my embarassment.
Pressing ANY KEY on the phone brings up the menu. Click the trackball, roll it slightly to select the other option, and click it again. Or press enter in place of clicks. That's REALLY easy to do! Too easy.
So to say that this sort of thing can't easily happen and that
"click-move-click" is a wonderful protection against it, you obviously haven't been dealing with this trackball phone or small children. Why not have it so that when you click Emergency Call, you have to actually dial 911 or something to dial it - similar to typing to verify a security wipe of the phone. I'm sure this will never be implemented, as the number of users that complains about this seems to be small. Makes me angry.