I am. Multiple individuals have... shared their experiences on the network, whether they were accidental or deliberate.

[Yes, someone did get themself deliberately mortally injured to test it out. No, he does not encourage a repeat of that particular experiment.]

Not if they have any sense, but those particular berries can be safely eaten by Pokémon, and are in fact greatly loved by them. It's easy to assume that they'd be safe for human consumption.