This is a very personally opinionated question. I am not asking you to agree with me, I want your personal opinion.
I have found that the questionable language people use in comments, particularly on Meta but on others too, is becoming 1) more frequent, 2) more diverse (in a bad way) and 3) enjoyed by other people. There are very many highly voted comments which have questionable language in them. (I decline to give examples, I don't want them in my question)
OK, let me define questionable language. I am talking about about any form of swearing or profanity. According to the FAQ this kind of language should never appear on SE sites. (and there is a highly voted language comment just beneath!)
Personally I do not use colourful language and I find it disturbing when it is so well accepted, and I am worried that this is going to damage the SE network's vision and reputation for being professional.
How must we respond to this? Should we flag more frequently? The one issue with this is that there are often "questionable" words in otherwise good and helpful comments.
I know many people will disagree with me, but there are people who would agree. If such language will offend some people, it is best to leave it out. Leaving it out will not offend anyone. This site is for everyone and everyone should be respected. I would really like to know your position on this, especially moderators.
Note: Do not respond to this with such language for a joke