Just to pile on... just a bit.
Following up on the item about non-elite access pax using the elite check-in lines.... I started a trip from EWR this afternoon and the security lines were very long... and the elite access security line (at the lower numbered gates) was being used by everybody in sight (yeah, I was checking out the BPs

).
I'm not sure if CO manages the folks who check the IDs/BPs at the security line, but there is little reason to keep the nice blue carpets if they don't mean anything.