[Correlli]

This will hide your name for every connected player.

pawn Код:

for(new i = 0; i < MAX_PLAYERS; i++)
{
  if(IsPlayerConnected(i))
  {
    ShowPlayerNameTagForPlayer(i, playerid, 0);
  }
}

and this will show your name for every connected player:

pawn Код:

for(new i = 0; i < MAX_PLAYERS; i++)
{
  if(IsPlayerConnected(i))
  {
    ShowPlayerNameTagForPlayer(i, playerid, 1);
  }
}

I think it's not hard for you to continue from here.