[Clavius]

You will need a variable to store if each player is frozen or not, like:

pawn Код:

new bool:Frozen[MAX_PLAYERS];

[...]

OnPlayerConnect(playerid)
  Frozen[playerid] = false;

Freeze command:
  Frozen[playerid] = true;

Unfreeze command:
  Frozen[playerid] = false;

Now add this check to /kill or whatever else:
  if (Frozen[playerid] == true) return SendClientMessage(playerid, WHATEVER_COLOR, "[FAIL] You are frozen, no suicide for ya!");