I tell those I see regularly, especially at work as I'd rely on the right info being passed onto medical staff, should the worst come to the worst. I don't embrace diabetes, I hate the thing. I saw someone only yesterday displaying either drunk or diabetic symptoms. It was a passenger in the waiting area of new street station in Brum. I was on voluntary 'travel champion' duty, helping the public negotiate the new station format as the station is halfway through re-modernising (long overdue btw) unfortnately the mid 50's gentleman (at my estimate) perished in front of me. The BTP and paramedics were in attendance and assumed the man was intoxicated and treated him as such. I've seen elderly relatives die and it's heart-breaking, but you at some stage come to expect it. While I wasn't traumatised as such, I thought, "that could be me at work one day if I kept it a secret". I work in birmingham, primarily and london, manchester and liverpool on the railway. Sometimes, it is wise to tell people who's business it isn't, really, so they can at least (worst case) say I have diabetes and I may get to enjoy another day. That is all from me on this occasion, it was a harrowing, humbling experience.
I hope you all keep well.
Mart.