I can understand why it might be the option of last resort upon late arrival. I've never done it, but admit, if my friends are on a mooring ball, and no balls available, and in calm conditions, I'd probably do it. I know I'd get a 'snake-eye' from the neighbors, and would certainly apologize for my predicament. I would not recommend it, just commenting if in a situation where my options were limited at the time. For sure, I'd take beers to the neighbors.