Someone Needs Their Mouth Washed With Soap

In the last two weeks, my daughters have, shall we say, expanded their vocabulary. It all started one day when I was at work. Hubby was folding laundry and Roo came around the corner to tell him Tortilla had called her "the b word"... except she didn't say "b word," she said the actual word. Hubby, to his credit, did not freak out. Instead he explained to the girls that some words are naughty and we should never use them. When I came home and heard the story, I had a similar conversation with Tortilla. She claimed to have learned the word at school when a classmate called her that word. So, I had a brief conversation with the teacher because I just wanted her to know a bad word might be circulating the classroom. I didn't raise a stink, I just told her the word had been used and Tortilla said she learned it at school. The teacher wasn't surprised and I got the impression that she's had similar issues with this particular student. I haven't heard the word used since that day, so I'm pretty sure it has been forgotten.
Then on Saturday I was enjoying a nice leisurely afternoon in the backyard with the girls. One of our neighbors came out to yell at his dog. "Get the F over here," he shouted, except he didn't say F, he dropped the actual F Bomb. "Hey!" I admonished... not really sure what to say after that. He seemed startled, looked at me, then looked at the girls and went back inside. I don't know him that well. Part of me wants to go knock on his door and unleash my own string of F Bombs, but we've never had an issue with him before so I'm hoping it was just a momentary lapse. The girls didn't seem to notice any of the words he was using, so I'm hoping to NOT hear any F Bombs dropped in my house anytime soon.
Don't get me wrong. I'm not opposed to swearing... if that makes any sense. It doesn't offend me in movies. I've been known to utter a blue streak when I'm angry... but NEVER in front of my kids. When I let them watch Dr. Doolittle (it might have been the second one, I don't remember) I turned it off as soon as one of the characters said "damn." Not appropriate for kids! When the girls asked me why I turned it off, I explained to them that there were naughty words in the movie. They still talk about how we can't watch that movie because of the naughty words.
I know my daughters are going to hear these words. I know eventually they are going to say them... and I've got my bar of soap nearby for when that happens... although I may have to lend the soap to my neighbor if he keeps up this behavior.