re: Would you tip for *really* bad service?

depends, was her section full and she was running around like a crazy lady? if so then i would tip and guess that it was just a bad day. i've only not tipped once and it was because myself and two buddies were at a pizza joint and were the only table. the waitress ignored us for most of the time and we only ordered appetizers. the apps came out an hour later. even the bartenders slacked on giving us beer.