Take down your damn tip jar...you're getting paid.
People from other countries always laugh at Americans because we tip too much at restaurants. Apparently, our zeal for tipping at restaurants now carries over to everything else. Wherever I go, there's some greedy little merchant with his grubby little paw out for an extra dollar tip...for doing his job.
You want a tip? Raise your prices. Jesus. Giving me a cup of coffee doesn't entitle you to a tip. Reaching into the display case and pulling out a pain au chocolat doesn't entitle you to a tip. Who the hell do you people think you are?! "Tips greatly appreciated!" They damn well better be - you'd better appreciate the poor idiot who gives you extra money for doing your job...
You're getting paid. Unless you're a server or a valet or something, you don't deserve a tip. Put the damn tip jar away, before I steal from it. Greedy jerk.