Yep have no problems with doing that. depending on the local setup.
If your in the circuit behined them you are more aware what they are up to / conditions. Than if you were on the ground.
If they are on a nav ex and you are local, ATC can tell you if there is a problem.
Wouldn't do it though if I was about to disappear off on a landaway. Unless it was one of the local lads who was waiting to get his NPPL through the post after their Class 2 got revoked.
MJ