[OPremium]

Try using the native IsValidVehicle:

pawn Код:

native IsValidVehicle(vehicleid); // It works, but it's not in the includes for some reason (https://sampwiki.blast.hk/wiki/IsValidVehicle)

public OnPlayerEnterVehicle(playerid, vehicleid)
{
    if(!IsValidVehicle(vehicleid))
    {
        // Whatever you want to do with him
        Ban(playerid);
        return 0;
    }

    // The rest of your code
    return 1;
}