I make it a point to turn most of the screws on my guns, just often enough to cover the maintenance intervals.
Haven't wrecked one since I was about 17. That said, I own a few guns with less than perfect screws. If the gun is useful, and functions as it should, I can live with a tacky screw done by someone else, about as well as I can live with handling marks in the stock.

Best,
Ted