tare: they provide bags for ground coffee. they vary in milligrams at most. i’ve never seen anyone use anything else.
wf: no, the scale (at least the one i’m referring to, may not be universal) prints a fully-barcoded tag, which they laser-scan at the register. i suppose a cashier could take the trouble to reweigh it and bust you, but afaict they really don’t give a shit. i can’t blame them; it must be kind of a drag selling ~1000x your hourly salary in overpriced food to yuppies.
