When I worked at a club, our head pro (who was an MRT) required grips to be tacked or stapled at the end and also a counter wrap of double-sided tape on the handle because we guaranteed our work for the life of the grip. It is definitely overkill but it only takes an extra minute or two and doesn't really cost anything. Members/customers appreciated seeing the extra effort and care to justify paying the service charge for 5 total minutes of work to re-grip.
I have an electric staple gun that accepts different types of staples. I use office/light duty for the starting end of grips and something heavier duty for butt caps.