Do you speak bad words?

I have observed that there are lots of people who speak bad words as a part of their expression. Sometimes there are unaware that there are speaking bad words because they are already used to it until it became a part of their expression. I dont speak bad words that much but i really try to avoid speaking bad words because i want to be a good influence to young childrens. Young childrens just actually imitate what old people are saying and speaking bad words is one of it. I have already heard children as young as 10 years old speaking bad words as if was already a part of his vocabulary.