A friend and I were out at Ikea buying some furniture and as we it onto the cart he drops it on his foot and says "Fuck!" Some lady we hadn't seen up to that point says "Excuse me, there are children here." My friend turns around and as politely as possible and says, "The world isn't censored"
My point being that more people need to realize that the world isn't censored, it will never be possible to censor the world and if you want your kids to not swear you need to teach them it is something you don't like so that they learn to hide the fact that they swear like a trucker when you aren't around.