Yes, Otto, it is quite a lame rant. It’s a good thing I didn’t put this in the pit, as I think I might have been flamed by this point (then again, I’ve never been flamed, and I’d rather like it). I am utterly in earnest in loathing nearly worthless coinage, but I’d thought the tongue in my cheek was visible … (No, I haven’t seriously comparison shopped for lobotomies)
Johnny Bravo’s idea is helpful. I have tried just saying “No thanks, I don’t want the change.” But, swear to God, I get looks for this, same as I do when I just throw them on the ground; like I’m being uppity or something. I will continue to try different lines.
I very much like Ukelele Ike’s suggestion. I will try this with my quik-e-mart guys on the corner (actually called that, too). I’ve been looking for a way to be friendly to them … they’re all Pakistani, and they sort of look nervous whenever customers try to make collegial small talk.
chestnutmare, I’m glad I never had you for a boss. 
Achernar, some businesses have tried that, and I’ve seen some, but I hear they all get tired of the angry “What’s the big idea?!” they get from people shorted a couple coppers.
Finally, Spectre of Pithecanthropus is exactly correct, though the metaphor could be better. Say instead of $100, it was $2 in pennies offered, with no rolls or bag or anything, just dumping it in your hand – I would just tell the person to shove off, and I don’t think it’s odd. It’s not worth it to fool with the things.
Or to put it another way, what would you say if your boss offered you a $.25 an hour raise ($10 a week!), but that it was contingient on you being paid not by paycheck but in cash, every six minutes all day. How many would take it?