Note that I am not saying that all realtors have bad habits of any kind. I am relating only my specific experiences with individuals. On the other hand if a realtor does this at a times themselves,I am OK with them being pissed at me for revealing it aloud.
Many times it is a broker policy in their office, so they aren't even checking if it is legal.
I find that in a small society bad habits can be catching.
You know
"Hey everyone does it! No big deal"