As someone who is part of something like 20 meetings or more every week - my role is very meeting-centric - I'll only say two things. 1) I find it extremely an

As someone who is part of something like 20 meetings or more every week - my role is very meeting-centric - I'll only say two things. 1) I find it extremely annoying to receive a message 30 seconds after the start of a meeting asking if I can join. Don't do this. Someone might literally be taking their only bathroom or snack break or stretch between 5 hours in a row of meetings. 2) If the rudest thing you can do is waste someone's time, then poorly run meetings trump minor meeting delays by a ratio of about 99:1.