Psh. A lot of people didn't like Bob. He pretty much didn't let it bother him anymore and found it easier that way. Besides, it wasn't like the staff were Bob's primary concern. Naturally, he was concerned about their health and welfare, of course (he couldn't help it, it was instinct), but the kids were what really worried him. Better immune systems, sure, but some of them were so small and delicate, and Bob seriously doubted that this Way bloke knew much more than basic first aid. The only patients worse than aurors in Bob's experience were healers.
He was relieved when Betsy slipped out from the shadow cast by several crates of Madam Muffin's Ready-Made Meals to follow him out of the kitchens, though he did experience a twinge of guilt. Hopefully Adam's allergies weren't too sensitive. Or severe. It wouldn't look good if Bob managed to send a staff member into anaphylactic shock within minutes of arriving.