Yes, but when I was in retail, we encouraged people to feel the clothes so they’ll want to take them to the dressing rooms to try on. And yes, occasionally we found a piece of goods with whatever on them. The mirrors were another whole issue. LOL!
When I was in jewelry, it was different, of course. The customer had to wait for us to get the pieces for them to look at. However, we spent HOURS cleaning fingerprints and even children’s lick-prints [ack!!...some parents!] off the display cases.
If I visited that museum, I’d find it hard not to want to touch those wonderful pieces that our troops used to keep us safe and free! To feel their presence.
But people should keep hands off glass cases. It looks nasty when the next person wants to look at whatever is on display. It's a pet peeve.
And you don't touch items in any museum unless you're told you can. That's just common sense. We have some things roped off but the cannons are large and there's really no way to rope them off. Not much room for that.