It's not just the strap locks you need to be worried about, you also need to check on how secure the screws are that hold those strap nubs as well. I purchased a brand new Epiphone Les Paul that came WITH strap locks. I thought I was good to go only to have one of the strap nubs slip out. What I did to fix the stripped out screw was to glue in some tooth picks, then re-screw the strap nub.
I was lucky that it didn't bang on the ground or anything.
[U]Ricks Current Mystery Video[/U] - Updated Monday March/02/2015