When I was raised and educated on these matters, it was 15%. 20% is reserved for exceptional service. I've actually decided the real problem is clueless people

When I was raised and educated on these matters, it was 15%. 20% is reserved for exceptional service. I've actually decided the real problem is clueless people like you trying to tip police others over immaterial minutia like exact tip percentage. Do my napkin FFS and see for yourself what my percentage averages out to. You're the ones manufacturing frantic guilt. It's like atheists and unknowns. Christ.