QSO TV is a great asset and addition to a QSO. It is not, however, the place to make a statement and move on, without even a single comment to the group in QSO.
Too often, I am seeing pictures during QSOs sent by persons not directly involved in said QSO. So far as I am concerned, this is the same as tuning up on frequency in the RF world. It is unwelcome, intrusive, and offensive.
If you wish to post a picture and become part of the QSO - you are very welcome to join in. Otherwise, do not intrude!
I too find it annoying when some ops post pix while not involved with the qso. When they are then invited to join there is no response so why bother posting a picture? Also when a person is trying to explain something about a picture someone then posts one on top. Please wait for a moment!