Red light for when a SC queue is passing the pit exit. Penalty for failure to avoid: Stop-go or DSQ.
Blue light for any hot track full green when any car is passing the pit exit. Penalty for violation: None, except for any ignored blue flags that result after. Any incidencts caused after would be investigated seperately, methinks.
Blend line violation penalty: Drive-through.
All in all, +1 from me.