yes you do, you just dont realise it yet
and besides, how can you so offhandedly organise violence to be done to an individual through the bouncers you know, yet curl your lip at the thought of doing it yourself?
anyway if you caught a guy slipping something into your sisters drink, and just let the bouncers know about it/call the police or whatever, you must realise that they will get away with it and will probably rape another girl at another time. therefore youre neglecting your duty as a good, moral person to put the scumbag in hospital.
frankly itd be tempting to glass the prick with the spiked drink.
things like that are amongst the only things that can really, really upset me.