I had seat reservation chaos the other week. Got on in Doncaster, seat reservations in my carriage weren't working and announcements were made. Not a problem, I just found another seat. One or two people moved when people with reservations turned up. Same with the next stop, a few disgruntled people, but it smoothed out quickly enough. By the second stop, however, the seat reservations were working again. Cue arguments everywhere between people who were already sitting in that seat when the reservations weren't working, and those who had boarded with a reservation that was by that point displayed. Fortunately the person next to me and myself volunteered our seats to the couple with reservations as it was getting a touch heated with people chipping in with their opinions on the matter.
In my opinion it would have been better to leave them broken and just announce that they're not working in that scenario.
Yes, I agree. Changing half way through seems another recipe for trouble.
I think the old paper labels were better. They were either there, or they weren't.