There were several examples I could give you of their being over-the-top: #1 ... I leaned over to look at a small picture's detail. The audio player around my neck lightly (barely) touched a table. Now I could understand a guard stepping up, tapping me on the shoulder, and asking me to step back. But this guard wordlessly swooped in, grabbed the audio player, without a word, and sort of glared at me. #2 ... In the very last room of the tour, that guard constantly paced back and forth across the room, with his head down, almost bumping into people, and muttering things into a handset. I've never seen anything like it ... and it's an atmosphere that is offensive and not likely to keep people anxious to visit again. I've never seen anything like it at a museum. A shame, as it is a gorgeous place ...

elsiemoo: you should write a note and tell them this, seriously ! Maybe they don't know and these guards should be reminded of making people welcome -
maybe they could mention it at the next 'meeting' or whatever they do with employees - please think about it, b/c you are right that is horrid and it is a wonderful place - if I were Director, I would appreciate a note like that