I agree, but in the opposite sense you are probably meaning. If office buildings have been left vacant for many months, I would wonder what sort of sophisticat

I agree, but in the opposite sense you are probably meaning. If office buildings have been left vacant for many months, I would wonder what sort of sophisticated surveillance systems could have been installed, tested, and activated in the interim. Easier to compromise the physical security of one large complex than 10000 home offices. The last place I would trust from a security standpoint would be the meeting rooms of a major HQ at this point, until they have been sanitized one-by-one.