I work in a business where we use radios a lot, and most of the staff are not really trained in two-way radio etiquette. We get a lot of 'over and out' which elevates my urine to greater than 100 degrees C.
A lot of the staff who are used to radio protocol come from different backgrounds (Army, Navy, RAF, marine and even CB enthusiasts) so the variety of exchanges is bewildering. Choose between:
A to B, receiving? - Send.
B from A, receiving? - Receiving, go ahead.
John, John, it's Mike, can you hear me? - Yup.
A calling B, come back to me good buddy? - Gotcha, Rubber Duck, wall to wall and treetop tall.
And so on.
And don't start me on site-wide control calls when there is a genuine emergency. Awful.