I am so jealous of you folk who haven't had to encounter SHB.
I've only had one hive (nuc) slimed, and I never want that to happen again. It is a smell you never forget.
If they encroach in your area, keep your hives strong, use multiple methods to control them inside and out (swifter cloths, DE or nematodes, Freeman Bottom Boards). My best tool, in my opinion, is my Freeman Bottom Board.