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It's actually "cameras and digital recording devices". My guess is that they meant to say "don't have your phone out in the bathroom" but someone in the meeting went "well my son records stuff on his Nintendo DS all the time" and they changed it.

If you're the kind of guy to bring a tape recorder in there and argue about splitting hairs, I don't think they will look kindly upon you.

Probably not an issue in practice: no one owns them anymore, no one walks around with them 24/7, and they're nigh impossible to use covertly.

Probably because the creepy boy scout leaders used analog video recorders and had a meeting to exclude them. Realistically it's just an oversight... hopefully...