Well said. The biggest offenders are usually companies & not the remote employees. I am in a great spot where I don't experience these today but the most frequent I've seen are:
Poor microphones set up around the conference room that make it hard to hear everyone.
No webcam at all or a bad webcam setup that doesn't allow the remote attendees to see the gestures people make.
Multiple people talking at the same time, but having very quiet conversations.
Using a whiteboard, a projector or showing a screen by turning your computer around but not making it visible to remote attendees.
* Basically doing things that the remote people can't participate in.
