[Samantha]

public Action:ev_PlayerTeam(Handle:event, const String:name[], bool:dontBroadcast)
{
    if (!dontBroadcast && !GetEventBool(event, "silent"))
    {
//There is really no need to check the team, if you are blocking all team switch messages.
              
            SetEventBroadcast(event, true);
            return Plugin_Changed;
    }
    return Plugin_Continue;
}

Also, if you must check for teams use defines instead of variables since they dont change.