I am about to embark on cruise #55 with 8 lines. And 4 A/I vacations and yet to see system working properly about chairhogging.
I would not expect it to work. It is very difficult to enforce, and crew is not very comfortable bothering guests, removing their stuff.
Recently we were in Jacuzzi in Solarium on Adventure for some time (after a long walk in Boston). When we returned to our chairs near window we found another passenger occupying it. She calculated we were absent for too long and it was a time to enforce laws. 🤣 There were many empty loungers maybe in the next row, but she needed one of our 3 chairs. She wanted to be by the window. We had towels clothing, tablets, phones etc on all three... so it was pretty obvious we are in the area, yet ....