I'd find it real helpful if I could get notified of vandalism instead of stumbling upon it god knows how long afterwards, and/or having the items replace themselves automatically.
That doesn't work as well for vandalism repairs as it does for habitat repairs though if you use a zoo layout that is more natural and involves guest paths that go off of main paths a ways to get to viewing areas unless you go out of your way to connect your staff paths to the staff rooms to those side areas. Mechanics going between staff rooms will not branch out to those side visitor areas and thus won't see or fix anything vandalized in those areas.Instead of giving the mechanics an habitat in their work zone, it's better to let them patrol between two staff buildings. They will repair everything on their way, and get a rest easier when they are close to a staff house. Normally, if they are not on research, and don't have to much to do, they will repair barriers too while patrolling.