I've had this happen both as a customer where other people at the table have essentially nicked tips to pay towards their meal, and seen it done lots of times when I've been working as waiting staff.
Its theft of your money and disgraceful. If they thought the tip was too big then fair enough if they wanted to check people meant to leave that much but you don't just take it! Also, the waiter or waitress probably spent a massive chunk of their shift looking after your 1 big table - so instead of perhaps getting lots of smaller tips from several tables that they could have had, they would have lost out and only got the £6 that this person decided to leave. I have a headache so sorry if my explanation isn't very coherent!
I see this has ended up in a debate on tipping anyway so will comment on this:
*WhatToDoAboutThis2017
Unihorn Right, but fast food workers also have a thousand and one things to do at the same time as serve people whether that be counter collection or table service. I would say it’s much harder working in fast food than it isn’t being a waiter, and those who’ve joined us from waiting concur with that.*
Sorry but having worked in both previously, I find waiting tables much harder. Not saying fast food work isn't hard but I did not find it a tenth as stressful. Its much more of a service as Unihorn pointed out - seating, taking orders, advising on meals and recommending wine etc, providing information on ingredients etc, ensuring clean cutlery and napkins are replaced between courses,offering refills, running food and drinks and checking its all correct and looking good and gets to the right customer, getting condiments, polishing cutlery, and all the clean up after! Plus all the extras like dealing with birthday cakes and special touches for celebrations, organising bookings and juggling 10000 things and once whilst making sure your guest has the best time possible. I don't expect tips, and half the time people don't leave them or just leave pocket change, but I am damn well grateful for them.
For me tipping is NOT about making up wages. Its a thank you for a good experience and everything you have done and just a nice custom. I tip my taxi driver, hairdresser and sometimes the delivery driver for takeaways and I get the staff at DS school chocs and thank you gifts at end of year and Christmas. Maybe I am a mug but I think its a nice thing to do.
And yes when I worked in a clothes shop at 16 we were not allowed to accept tips.
If you don't believe in tipping then fine, but I don't think its hypocritical to tip a waiter and not my checkout assistant at Tesco.