(These are all things I've saw or heard with my own eyes and ears, not simply hearsay)

1) House-Keeping simply "wipe clean" used glass and cups and put them right back into the drawers (at a Sheraton I was staying at)

2) House-Keeping talking to each other saying "don't change the linens and others, we're late, just forget it, the next guest won't know it anyway" (at a Le Meridien I was staying at)

So, I am suspect now.