Verdict from all 3 cases.
Gravity change abuse confirmed. Slap command confirmed (but not excessive). !freeze @t command confirmed.

He seems to be a new admin, so first time offense i'm gonna be easy on him and give him a warning. But punishment will be needed. 4 hr ban has been issued and a warning will be issued.
Hobos, i highly suggest you read the TOS and zm rules.
Votes do not allow you to change gravity, freeze people, or do any other actions than change maps if you are senior admin.

Resolved, closed.