Is it okay to drop my tip out beds at rest stops or Walmart?

I once talked to a WM manager about slide outs and he didn't even know what they were. Once I explained it he could not have cared less. And you don't have to look like your just parked there - they know you and all the other RV's are spending the night and don't care.
This thing about not putting slides out is more of a internet folklore thing than it is a genuine concern.