Why do people hone in on me for using curse words on the internet?

And said things about people at home and in obscure places?

I grew up not cursing and by gauging what I say about others. I just had a little fun, nothing serious. I told you I thought the couple wanted me to call their 2-year-old daughter the "n" word online.

Like, I would say maybe, "that f-ing ..." or something along those lines.