While I like to see how long an ash I can get goin', I'm always worried once I get a good one that the dang thing is going to land in my lap. Not the end of the world of course. Just stand up and shake it off, don't rub and that usually takes care of it. But then, what's the ashtray I bought for?
I'd rather the ash fall in the tray rather than on the deck but the wind will take care of that. So it's all a matter of the mood I'm in. Either let it build and not worry about it or gently roll it off in the tray.