Poly CL is in a separate building. You have to scan your band to get in. So anyone who doesn't belong would really have to sneak in behind someone else. And I think it would be really obvious that they were sneaking in. So hopefully a CM would notice or the other guest would say something. We stay CL every trip, usually at YC. But we have also done BWI, GF RPC & CR. We make 1 -3 trips per year. I can't remember noticing anyone else try to get to a floor they didn't seem to belong on. At YC, BC & GF RPC, you have to tap the elevator button to get to the CL floor. So I think it is a little hard to just sneak into the CL floor. If we get on an elevator with someone else, they usually push their floor & then we tap our floor. So it is obvious they are getting off sooner. And they would probably look out of place when they get off the elevator & don't know where they are going.
I know it has happened that people sneak in because I have read reports years ago. But I just don't think it is really common. And if they are monitoring our MBs to see if we belong, I have never seen evidence of that. We don't really "get to know" the CMs, even tho we go so often. And they never seem to know us, except to smile & say have a good day etc. I have never approached the CM desk & had them know who I was. So I'm not sure they are tracking my MB.