If you've ever worked in a restaurant in ANY capacity, then you know that the human race is largely composed of douchebags (pretty sure I saw a pie chart that puts it at 57%) who believe they're entitled to treat the servers like 13th century serfs. 

Basically, you're creating an enemy for life if you're: old, young, have kids, celebrating any occasion or ask for lemon slices, NOT lemon wedges. Workers of The Restaurant have a message for restaurant/bar patrons everywhere, "get the fuck outta here." 

Just tip your server well first, and then get the fuck outta here.