The wave phones are easy to ignore for the most part. However ours kept beeping if the battery was running low. Maybe we could have figured out how to turn them off but for some reason I never did.
We tried to use them with my parents as we were cruising with them. But similar to their cell phones, they could never figure out how to answer them. Unless they had my DD with them, they never answered them.
Most people on the cruise only use them to check in with each other. Only one annoying person was having a long, private phone conversation on them in the elevator and then got off (same floor) and continued this long conversation. It was like she hadn't seen the other person in weeks.
And yes, I double checked that it was a wave phone and not a cell. It was really weird.