This squares with my experience in Illinois after a couple of elections. * As a security/integrity issue, the ballots themselves are much less scary than the pollbooks, which are what we use to match voters against the voting rolls. * Everything's ultimately on paper; there are bar codes, which nobody loves, but they're auditable against the readable printed ballot. * Most of the security is physical/human; for us, e…
Likewise in regards to the police: we had DuPage sheriffs wander in occasionally to look around and chat - they were reasonably friendly with some random chitchat. I don't think they were looking for anything in particular, just trying to deter any mischief by being seen openly.
One thing that surprised me is how hard election judges worked: I started by 6:30 AM and only ended at 8:30 PM, with maybe a 15 min break for lunch. All the other time I was handing out ballots, doing paperwork, giving directions, etc. In DuPage election judges get $100 for the whole day - I would be in favor of doubling that plus some money for lunch + dinner.