We bought over 50 teaspoons. I think we're down to 5. We got 10-15 each of knives forks and spoons and they were predated, but not as much.
The body corporate tut-tutted and said they wouldn't do it, I think it's ok to accept some people just wind up pilfering these things, and you deal with it. If you need flatware that badly, I don't mind.
Its 4-5 years in, we probably need to recommit. I don't know I'd go to the bother of etching or stamping anything.
My sister and I fought over who got the NAAFI (british army PX) fork with a hole in the handle. The hole was for a chain, which clearly somebody broke, to steal the fork, which wound up in our cutlery drawer at home in the 50s/60s.