I'm one of those sometimes angry students...when there is a problem, such as keeping the door open the entire class without explanation throughout the entire class, or blathering too socially rather than teaching or favoring rude behavior from other students rather than addressing it, I've been known to voice my opinion after class in a quiet but forthcoming way, if the teacher listens and takes a moment to explain the reasoning behind the offending situation, I will see their view and calm down. If the heaven forbid talk all fake and serene and use the word "projecting" I will never go back and have to refrain from screaming abuses in their smug little enlightened phony faces.
I have allowed students to enter late as long as they enter quietly without disturbing others. At the beginning of each session I teach simple things like quietly entering and rolling out your mat, taking a few breaths to center before joining in with the class. I have had students enter late, angry and frustrated, bang down their mats and generally disturb everyone. I pause class, instruct the student on proper entry, and use the moment to teach all students the need to respect and value the experience of others in the room when they enter. This goes not just for yoga classes, but works well in meetings at work, office get togethers, and social settings.
When a student comes late to my class, I acknowledge them and I smile.
This is just what I needed to read today. I teach a class of mostly regular adults who have been students of mine for 5+ years. Before my class last night, one of the new students stopped me to tell me she thought I talked too much during class and could I stop. It delayed the start of the class and immediately I felt like I was restricting the other more experienced students. My class is bubbly, talkative and full of joy. I do reserve absolute quiet for 5-10 mins at the end of every class for meditation. It was hard for me to hear this, but I realized immediately that I can't change my teaching style. My regular students immediately started to chat after our salutation warm-ups. I guess what irritated me most, was as we warmed up, the student that had complained immediately started talking to the person next to her during the warm-up. It was a hard decision to make but I immediately suggested that the complaining student find another teacher. She was upset, but I realized, I could do nothing for her. Amazingingly, she's told me that she is still committed to coming to my class. I think she needed to be heard, but being new, she had to understand that they are many others in the class and she had to respect and understand their needs as well as her own.