I've hung the 660 on it many times.
My S.Light was run with shembiners outside the webbing for about 4 years before it times out of use.
I also clipped the tail of my lanyard to the little hole in front of the caritool slot and dropped top handles onto it more than a few times.
If you're worried about it, you could set some webbing through the hold point on the shembiner between the layers and tie it around something. Maybe around the webbing?
A popular option is to get the enforcer and install it over the webbing as well. The flat, stationary plate with round edges won't wear out the webbing.