Not sure how I found this post since it is a few months old, but it's new to me & taught me something so I just had to comment. I saw a quote in the thread that said it was rude to dump your boot water on the deck. I do that & it never occurred to me that it was problematic. I'm guessing cause it is thought to contain more pee? In any case, I'll dump it over the side of the boat from now on. Oops.
My two cents:
98% of the time, I've found divers to be friendly & nice especially since I avoid cattle boats & research the ops ahead of time. (I vacation dive mostly by myself ~4 times a year from local Caribbean to exotic places like the Solomon Islands. Been on a few liveaboards. Once in a blue moon, I dive local NE cold.)
For the problematic 2% of the time, I've found that I get the best results by taking the rude person aside to politely & quietly point out the issue. I've definitely had some doozies in the 2% though...
At 120 ft, a diver slammed down on me from above & kicked the reg out of my mouth.
Someone continuing to smoke after I politely asked them not to citing nausea....& then blowing smoke directly into my face. (A long time ago, I was a smoker. I get having a nic fit, but if someone asks you not to smoke, it's rude to continue & even ruder to purposely blow the smoke directly at the person.)
An insta-buddy who literally walked over 100ft of coral to take photos.
Major harassment by a few older know-it-all guys re: my gear & diving. I'm always open to someone saying: hey, have you ever thought of X, but this was way over the top.
Shoved out of the way with 2 hands by a guy with a GoPro who then told me topside that he had the priority to see the "good" stuff because he had a camera.
A dr in his 50s in a banana hammock w his 22 yr old "student" in a string bikini grinding on each other...on a tiny boat.
My topper: Wreck penetration & a guy shoves in front of me so he can get into the wreck first. Then, when inside became Mr. Kicky. At one point, he began backing up very quickly & closely while kicking furiously. No one was behind me so I backed up quite a bit to move away from him...into a nasty piece of metal sticking out which ended up with me having to get 11 stitches.