I always wonder at the weird brackets aftermarket exhaust companies came up with to hold them up!
I don't have awful lot of pet peeves with regard to motorcycles, but you guys have touched on one. Aftermarket exhaust brackets. The '90 semi project Vmax that I have has 2 Brothers slip-ons. These are some huge cans. Whoever installed them nicely fashioned a couple of very substantial aluminum bracket/hangers to support the massive mufflers. Hangers that suspend from the shock mount/grab rail area. I intensely dislike that and am of the opinion that if a muffler can't be hung with a bracket that is almost invisible, it shouldn't be on the bike. In this case I will let it slide because I will not be keeping this motorcycle.
Then there's my 750 K5. Gorgeous, pristine Kerker came with it. But, yeah, you guessed it, that fugly steel bracket made to hang off the shock mount was expected to be used to hold this can up. I refuse. I trimmed it back, bent it into shape, and tied it into the rear footpeg mount. This can isn't going anywhere. And you can barely see the mount. Started quite a spirited discussion about this on another forum.
(Yeah, I ditched the cupped rubber washer for a fender washer. Bad idea.)