I've seen newbies at public skating think that the guards are available for anyone and then the ninnies put them on and try to walk on the ice with them. Belly Flop Anyone?
I use the one-piece guards and take them on the ice with me along with my shoulder bag. I always close the doors to the penalty/scorers boxes because of the jump harness, electrical cords, cables, computer, music player, and scoreboard controls are all accessible. I put my bag and guards in the closed-off boxes. IMO, the two big team boxes are enough for the public skaters to use if they're tired or need to tighten skates. (People taller than I hook their guards over the top of the hockey glass inside the rink/nets, but I cannot reach that high, lol.)
The only time someone messed with my guards was during a Friday Night-Teen Madness-Beware public session. The little twerps opened the box doors to make out/hang out. One of the quartet members decided to pull the rubber loops off my guards. When I went to get my stuff to leave, I had to reassemble the loops, which were tossed on the floor. Could have been worse: they could have set them on fire (which one skater said happened to her) or broken/trashed the loops. At least they didn't rifle through my bag or damage/steal anything.
OP: use a permanent marker to put your name on the guards. Put them behind the open rink door, on a lower ledge or wedge them behind an upright post if you can't take them on the ice. Out of sight, out of mind. A lot of guards get knocked down off the top of the wall because people don't see them, or they lose their balance and grab the wall for support or because people are mean. Rave: Our current hockey director resolved the problem of the waiting hockey players spitefully making noise, knocking down guards and intruding on the ice with sticks and skates during the end of the freestyle session while they were waiting for the clock to tick over. It's a complete turnaround - the hockey kids are friendly and well-behaved while they wait.
I was watching a skater remove her Rockerz guards this morning and it looked difficult! She almost fell over and she's not a rookie skater. I was surprised - maybe she went up a size in blades and these are too tight. I'll stick with the cheapo one-piece guards. (That reminds me: I need new guards. Mine are wearing out. Santa Baby...)