Application too dangerous? Depends.
I like to have 3 responses to every situation:
a) to gently swat someone screwing around
b) to cause enough pain to discourage
c) to maim or kill
Not many kata techniques can do all 3, but here's one from the very end of the Isshinryu Seisan kata. You shift back into cat stance while grabbing with both hands and performing a small mawashi uke (think of a quick turn of a small steering wheel).
a) Turn the foot you trapped to the opponent's "inside". This will turn his face away from you. You can either push him to the ground or kick up into the groin.
b) Turn the foot the other way. Severe knee trauma.
c) It's not the foot - it's the head you've got. Severe neck trauma.
When picking the level of response, choose wisely. Don't use a hammer instead of a flyswatter, or vice versa.