Should bartenders be held responsible for the behavior of their patrons?

Drinking is a problem, but are bartenders should be the ones kept responsible for these alcoholics? I think bartenders shouldn't be responsible for actions done by the drinker. It is the bartenders job to serves drinks to their customer, protect the bar, and get paid. However, bartenders should give a little caution for overdosed drinkers. It is the drinker's decisions that they make for what ever consequences they may lead to. We shouldn't blame the bartenders for not keeping us responsible. We should blame ourselves.