How do you deal with people who don’t respond to words like “Bon appétit” or short sentences?

Sentences that are not questions. For example, someone talks about themselves and you say, "Respect that you managed that." Then the other person doesn't respond and continues to look at their PC or something. Do you even expect an answer? When is it considered disrespectful?

Man didn't want to make room, what can I do in such a situation?

I just took the bus home, and it was quite crowded today (more crowded than usual). Because I'm extremely overweight, I can't stand for long, so I asked someone in the emergency seats to please give me their seat, as I depend on them. They didn't understand, and I had to stand in pain for…

Mother with her children meets with grandmother and her older new boyfriend briefly in the cafe…?

Grandma went on vacation with him. Both are noticeably brown. The children's mother mentions this. Grandma says, "Yes, brown, except for those certain white patches of skin here and there…it looks like a white maggot, you know, like a white maggot," and laughs briefly. What do you think of this behavior from the grandmother, especially…

How can I point out mistakes in my boss's signature?

Hello, My boss has an academic title and a master's degree. I have every respect for that, but he abbreviates both incorrectly and places both before his name in his signature (the master's degree belongs after it). How can I convey to him that, as the head of a 1,500-person company, this is a bit…