I love when people get all twisted up when someone does something different than they do on their bikes... just about the most individual thing you can do is own and operate a motorcycle.. yet everyone gets damp panties when someone has the temerity to change their oil some other way than they use.
Personally I'm waaay to lazy to rig up something like that to suck the oil out.. but I can see where it could be pretty nice to have it all nice and neat like that. I"m a kluzty fuq and half of what I try to put from the oil pan back into the jug ends up on my driveway, so it'd be nice to have the oil all in one container that I could take to the parts store for them to dispose of. Not mention, I'm notorious for dropping the Q@%#@%@$##$#@! crush washer into the oil pan too.. damn thing ends up sticking to the case half the time when I pull the drain plug.. then falling conveniently after the oil start gushing.