This is one of the dumbest arguments i've heard. If a pokemon is to be quickbanned it should be able to do this without what is clearly required team set up. IE perish song gengar on defensive teams, mega khan in general, blaziken, or deoxys. Sure, if the right requirements are met luke can sweep a whole team, the same thing was said about regular luke. So many of these scenarios are hypothetical situations where the person playing against the luke allows themselves to lock into a move that luke could switch into or makes it easy for him to get an SD. You could do the same thing with any other set up sweeper with decent priority. I think this transition to X and Y and things like mega stones has shown the biggest problem in this community. Whatever is the "strongest" at the time starts getting all these ban requests from the community. First it was gengarite, then it was khangaskanite, (both of which i totally agree with), but i read in this thread a couple people say Mega Lucario is clearly now the strongest mega (and essentially should be banned because of it). There is always going to be a top dog, and it's not like Lucario's checks/counters are super obscure like khangaskanite or blaziken. I would agree to further testing through a suspect test to see if lucarionite deserves a ban, but I think a quick ban is very, very excessive.