People aren't happy with this tipping hack from CNBC

For the times when you don’t feel like cooking after work, a meal out is always a great way to spend an evening. You get to let someone else take over the responsibility of cooking while you sit back and enjoy being waited on hand and foot. Going out for dinner can be the perfect opportunity for you to catch up with friends you haven’t seen in a while, or maybe even share a romantic date with your other half. However, as delightful as an evening meal out can be, there’s always one thing that can threaten to derail your evening – tipping.
It’s something that you’re expected to do after every meal here, but what’s the right amount to pay to please everyone? You want to give your servers what they’re owed, but you also don’t want to break the bank when you’re already paying for your food. This conundrum can really throw people off their game, but it’s crucial you don’t scrimp with your tip. After all, as CNBC discovered, other people don’t like it when you try to avoid paying the right amount.
[post_page_title]Money, money, money[/post_page_title]
Depending on where you go, a meal out can either be a cheap way to spend an evening, or it can really put a dent in your bank balance. It can be hard to justify throwing a lot of money away on dinner, although it’s not too bad if you don’t eat out regularly.

Of course, the more a person spends on their food, the less inclined they’ll be to tip the waitstaff generously.