ANYBODY and ANY TOOL reguardless of being a snap on CAN round off a bolt. Professionals can round off bolts. I have friends that are professional mechanics that do this for 8 hours a day and they show me stuff and tell me stories of rounded off fasteners. BUT... Some of snap ons stuff has better teeth.
For example, show me a craftsman that has the special grooves on the 22 mm wrench:
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&ih=019&sspagename=STRK%3AMEWA%3AIT&viewitem=&item=290231464126&rd=1
But still, we are getting off track, has anybody waved down a snap-on truck and gotten a free tool that wasnt the original owner or without receipt? Anybody have to mail back a tool for warranty?