Are you annoyed when somebody says “no problem” to you after you’ve responded with the lack of interest due to that unsolicited offer they’ve just made you? Do your eyes moisten with despair when your ordinary request – at premises specifically there to service that request – is greeted with “no problem”? Is your gast flabbered that anybody who says “no problem” to you under such circumstances does not know how rib-tighteningly inappropriate such a remark is?
Do you want to ask such people “Why would it be a problem for you to solicit my attention for something you provide in which I’ve …” either (a) no interest, or (b) an interest. Or – more briefly – “What the hell’s wrong with you?”.
If so, then you may want to calm down a bit. The phenomenon doesn’t seem to be going away any time soon, and may even be growing.