Not around here, it isn't. I tried that three times, giving up after getting a mix of disinterest and hostility.
Which frankly confirms my instincts, I only tried because I've learned not to assume that my preferences match the general public's.
Someone physically and/or verbally attacked you for thanking them? That's the only negative outcome that I can imagine, and what I'm reading when you say "hostility."
Lack of interest seems a typical result - are you expecting to be thanked for thanking people? Theoretically, that forms a chain never ends. I thank everyone for everything that they do for me; sometimes they reply with "you're welcome", sometimes our 'thank-you's collide because while I'm thanking them for their service, they're thanking me for my patronage, sometimes I get a smile, often I get no indication that I've said anything.
None of those are failures, because the goal was for me to thank people, not to be praised for thanking people.
Someone physically and/or verbally attacked you for thanking them? That's the only negative outcome that I can imagine, and what I'm reading when you say "hostility."
Attack seems too strong, but an hostile tone, yes. More than once.
My goal wasn't to be praised, but I did have a goal of actually causing a positive effect on others; I have no interest in "good deeds" that help no one except the performer to feel proud about himself.
Considering that all signs indicated I was actually bothering people, I stopped, as I think anyone should.
Some people don't appreciate it; some people think you are being ungenuine; some people don't notice or care; some people find it uncomfortable that you're choosing to break the social code; some people are confused by that. Yes, you're right.
So what? Are you giving thanks because you want a service worker to validate you, or because you are grateful to the other person and you want to show your appreciation?
I interact with many store clerks more than once and, on the second occasion, I want them to know clearly that I wasn't pretending when I gave thanks the first time. A majority appreciate it.
Neither, if I give thanks it's to improve the other person's day. Giving thanks just because I'm grateful, regardless if the other person will appreciate or be annoyed, is just being selfish - making myself feel more virtuous without actually improving anyone's life.
I interact with many store clerks more than once
Ah, yes, I also have a friendly relationship with a couple of people, like the corner store owner, and I thank them habitually. I was speaking about people I only interact with once or rarely.