I hate to profile, but the older cars are more affordable, and available to the "entry level" crowd that are typically more macho and more prone to such displays.
If you can afford to get up into the higher caliber stuff like Cobras and Shelbys, you probably have been around the block before and are a bit older, wiser and more seasoned, having survived getting all that nonsense out in one's youth.
But, AssHats can be found anywhere if you look hard enough. Just don't let the few spoil the image of the many. Well, since there are so many 'Stangs out there, perhaps the many spoil the image of the few.