Eh, language is complex. Maybe some people read too much into the absence of a please, but in English, imperatives are in fact intrinsically rude most of the time. If I say, "open the window", that's rude in 9 out of 10 contexts, as opposed to "could you open the window?"

That said, I have absolutely seen people be excessively polite in a way that comes off as non-genuine, but they are always ESLs. I assume they just have a hard time seeing the line, so they try to play it safe.