I've run boats up to 50 feet and never come any where near running someone over. Even when running home in the dark after doing charters for the old symphony of fire, fire works shows. After the show is over there are hundreds of boats heading home and never had anything close to an issue.
It's all common sense and courtesy for others.
Last year I was heading up the channel back to the dock after a day of fishing and there was a boat exiting the area. He was on the wrong side of the channel and I had to evade by leaving the channel. I ripped a strip of the guy, as it turned out he had a pack of rug rats on the boat that got an education in swearology that day.
The guy had no clue, I can only hop he ran a ground on a rock and no longer owns a boat.