i iwork in a tire shop and have never heard any problems with people not knowing they have a flat. as for low pro being bad, the other day i put some Pilot Sport A/S 285/35rz18 on a 1996 porsche Carerra 4S. i asked my manager if that low pro was bad because i am still new, and he said that its stock. if it wasnt safe, or you were not able to tell if you had a flat or something, they would either not be sold, or they would have to be runflat. DOT is anal about stupid shit. i am not trying to dis on anyone or tell them they are retarded. what could have happened is you had a slow leak, got the tires too hot and caused the sidewall to go out rapildy with the belts and everything seperating. that would destroy the integrety of the sidewall and if it was around a 45 or lower series tire, cause the wheel to cut in and cause all this to happen. sorry for the spelling errors. Vocabulary wasnt a strong point in school.
Edit: the amount of force it takes to break the bead i dont believe can be optained by driving. even with no air. i have had BMW wheels and tires come in where the sidewall was seperrated from the tread, but never, never the bead broken. with a 40 series tire, i could break half on the ouside bead, put all my 150 lbs on it and the rest still wouldnt go. well, if you had a crappy Les Schwab tire, maybe but still i doubt it. usually it takes anywhere from 40 up to 120 PSI just to seat the bead for a 40-50 series. i have had one seat at 120. can be scary shit if not done right. its a bastered to break low pro beads like that. once again, not trying to tell you that you are retarded or anything. just giving my 2 cents
90 Jetta GLi 2.0 16v