Earlier quoted context omitted.
The core problem here is that interpersonal relationships are not government by simple context free objective rules. Person A in Situation X can say and do things that are perfectly acceptable that would be deplorable and disgusting if Person B in Situation Y did precisely, exactly, identically the same thing. You can grab your lover's ass, but try that on a random stranger. Which makes telling people what they can a…
I don't think this is the core problem. Feedback is occurring, and the response isn't "Oh, I'm sorry. I'll avoid doing that in the future." It's "lighten up!" That translates roughly to: "what I was doing that bothered you is so important to me that I refuse to stop, so get over it." I think that is the core problem.
It is a lack of communication issue. In that article, many of the "lighten up's" are assumed based on past experiences. For example, she did not even address the guy for fear of interrupting the meeting.