I guess you're right. Ive seen them work and also wreak havoc. If they work its cool I guess, I know on CBR 929's especially the frame cracks right where the slider mounts most of the time.and here I've seen them work in EVERY crash...they ain't fairing or tank protectors...but they do help prevent twin spar perimeter frames (such as we have on the Busa) from getting ground down annnnd....they take/absorb the brunt of the impact to your engine case & covers....and saving te frame and engine IS most critical...and I'm not talking some POS LP or somebodys home-made nylon tubing with a bolt & fender washer kinda sliders here...I'm talking quality sliders...such as those made by Vortex...where the puck base registers into a counterbore in the frame...and then the slider puck mounts to the puck base with a huge diameter boltface...they work.Honestly, I don't believe sliders would have done much in his case. I have yet to see them work in any crash more than a simple tipover.Not to come off sounding like a ##### here (as I do feel bad for anyone who goes down and sustains damage) but 1 word to the on-looking wise here...."Sliders"....they would've saved most if not all of the engine case damage...point being?...scruffed up plastic and dinged pipes I can still ride away with...but once that engine case starts bleeding Mobil 1?...it's time to call someone with a pick-up truck.
My thinking is why direct the impact straight to the frame rather than have the plastics and easily replacable bits absorb the impact since they will get rashed anyway. Just my .02