That has worried me since I saw those seated in plastic. I get the screws really tight. Nail breaking tight. Even so, one day I noticed a screw missing. At first I thought it had somehow snapped off but luckily, VERY luckily, I found the screw laying in the console of my Jeep.But a drop didn't crack it.
Back then I was changing batteries 3 times a day.
... over tighten the screws is what cracked it.
I don't change batteries either, so I thought about using just a little tiny dab of lock-tight on the screws. But I decided that would put stress on the plastic part too when I tried to remove the screws. Now, I just check tightness more often.