duke- i don't think i've ever encountered anyone with problems as severe as that, doh. sorry about the trouble, but the frames shouldn't ever crack so bad as they're unusable or even unnoticeable. even when the frame does break, you can simply send them in for a new set, oakleys has an _awesome_ customer service dept. even after your warranty in a year they'll still take good care of ya, but maybe your problems with them are quite serious. in which case i don't know what to say, guess just bad luck =D
most people that don't see a justifiable difference to buy real from fake oakleys don't look past anything besides having them look the same and having them just darken the light around them. real oakleys have an awesome design not just in the structure, but the lens. they have different lenses for every wavelength and use, not just different pretty colors. for example their standard black iridium lenses are awesome for bright light, blocking a lot of glare and general shine, which foakleys will also do to some extent.
but oakleys also have awesome amber colored VR28 lenses and persimmon lenses, which are infinitely better for many things. for example, when you're snowboarding you can't use standard dark lenses like foakleys or black iridum oakleys have, the slopes just disappear from you. it's also not a good idea to use them for driving through say a lot of filtered light, like in the mountains where the light gets filtered down through all the trees or any other forest-type environment. your eyes can't adjust to the quick change in lights so quickly, so foakleys are also horrible for use as driving glasses. but when you use the VR28 lenses or such, then they increase contrast around you so you don't notice a change at all when you're driving through bright areas of light into shady areas, back into bright light, back into dark, etc. you can also notice the small slopes around you when you ski past them at high speeds, so for snow sports you can't use foakleys at all. or bicycling for that matter i presume, going through filtered light (i'm assuming, since i'm not a major bicycler myself). ever notice why sunglasses for snow-use are so much lighter, more often tinted yellow and orange then black? that would be why, they're specially designed. i'd never use foakleys for real sports, and i'd go without sunglasses completely then use foakleys on the slopes.