Outgoing students continue to chatter while many people remain in shivasana. Incoming students, particularly arriving for the power yoga, are particularly disrespectful for those finishing their practice in shivasana.
We all work to reach a good shivasana, and the teachers are recommending 5 minutes of shivasana for every 30 minutes of yoga. After a 90 minute class, we are not given that opportunity, even an abbreviated one.
This can easily be corrected. It is up to the teachers to teach the 'students'; for those teachers finishing their class, advise people to leave the room silently as a courtesy for those remaining…and for the teacher opening the door to the masses, advise them to not speak if others are remaining in shivasana. Perhaps also opening the door just 5 minutes prior to start time would create a block of quiet time.