By all means feel free just to chat in the guestbook - as long as it's not spam!
Anybody with Admin below their name is definitely me or a trusted person. I myself will always sign as Butterfree. If somebody signs under that name but does not have the Admin label, it is most likely an impostor.
Nope. Deoxys isn't a mandatory catch (it'll respawn at Sky Pillar if you faint it) so it's okay with a catch rate of 3.
Commenting on: 12-14-14
So Deoxys' catch rate actually wasn't changed between XY and ORAS. That's actually kind of interesting.