I'm not going to tip while on vacation.
Really? How do you think the waitress will feel when you don't leave a tip?
I don't care about those little people, they are all beneath me anyways.
Not tipping is disrespecting the waitress and staff of the restaurant. It means that they are going home with nothing to show for all of the work they had to put in during the day as many servers don't make much of an hourly wage.
I'm also going to talk about it on my Yelp review.
Noting that you refused to tip on your yelp review will only make you look bad. If you had a good meal and people were friendly, you need to tip at least 20%.