I don't hate the roasts, I hate that their done so incredibly badly. I watched the Denis Leary Roast a few years ago......and that's an hour of my life I'll never get back.
How many of the people on that roast, actually knew Leary? One, two?
The Kevin Harvick roast a few weeks ago was pretty funny, but that was probably because it wasn't a group of "comics" who don't really know him. It was his wife, his best friend, his boss, sponsor, etc.
Same with the Gene Simmons roast a couple of years ago. The funniest stuff came from Shannon Tweed, his son, his bandmate, etc.