You could still return it if you needed to. Wiping the BB doesn't cause it to spontaneously burst into flames or anything, it just wipes clear the data on the phone. Basically returns it to an out-of-the-box condition.
That said... be careful tinkering with your device if you're worried about drastic. There is a hidden key combination that really will fry your device.* It's the equivalent of requesting that the BB self-destruct, in a sense, when the phone is lost and critical data is onboard. In short (no pun intended), the key command will force the BB to short itself out, permanently rendering it useless. So be careful.
* Or maybe not.
Semper Fi 3/2/2 "Wow" is now overused. Therefore, I will use "Magic bananas" instead.