What will concern you most? The behavior or the word that certain people use?
I am very particular on how people speak, and choices of word they use. I think most of the people out there too.
I hope I am not part of the group of people that using bad words. And I really hope not to be within these type of people. it's really damaging. Your perception towards them and people's perception towards you. Oh.. Forget about people's perception. Let's look for Allah's perception & mercy. May we are not part of them.
And I really hope that my kids won't have the ability of using bad & insulting words that really can leave a deep or minor scar to other people. I have felt it, and the scar won't heal very fast.