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u-turn/volt switch (although good teams do have punishes for this, they are minor like rocky helmet or ground types)
scald (was even worse before burn nerf)
knock off
twave
every zmove lol
hazards at no risk are generally a reward for getting a good matchup, but stealth rock is easily the most mindless because its the easiest to set up and is more widely available than other hazards (spikers and tspikers are in general not as common in OU)