These poo-for-brain people aren't necessarily racers; i've seen a load of different people do stupid stuff in the park:
Boarders sitting on landings
Gaper mom and dad taking their little kids rolling over the kickers
racers(ranging from 5y old racers to 70y old coaches) lightningbolting through the park scaring the shit out of ppl and cutting me off
Thug skiers skipping line at jumps or paying no regard for what is happening
(i've seen a 5y old kid getting wiped out on a jump, then being skied over by a thug who didn't find it necessary to pay attention to other ppl/wait in line... The little girl was rushed to the hospital but was luckily only suffering from a concussion...)
Thereby my next poo-for brain ppl: Little kids going too huge or too small on jumps, going sideways off rail kickers, zigzagging through kickerlines,etc...
Old people plowing through the park, making pictures of eachother
Skipatrol, telling my friend it's forbidden to invert (he was doing 3s ...)
Poo for brain shapecrews closing off the part of the park that's in the best condition and leaving the most dangerous and icy part open + working slower than i could possibly work
(^^and no, they weren't shaping for a contest or whatever, it was regular park maintenance and they decided to close off the big air line that was in perfect shape, no ice, solid landing and take-off, proper speed, etc..)
while the rest of the park, the smaller jumps and rails were all skied to pieces by gaper folks, the little kickers eroded to the point that only two bumps Left and Right remained...
/End rant: you shouldn't ban racers; you should only ban people acting retarded, not thinking about what they do....