I think that they're just words. Words only have meaning if you let them. Honestly I swear all the time because i don't let words hold meaning.
Quite controversial. I guess it depends on the context, and/or what type of person is saying it in a certain context.
ppl complain about other player saying xoxo or really random things. You could say that something could be used an "excuse" because someone could see WTF as bypass etc etc. Does it make much sense? No. Will ppl still use it as a reason to report someone? Yes. Would it be valid violation of a "rules" as they are written? Yes. Normally this would and should just result a warning.