I believe it was already confirmed that you can damage the visor on tanks.
And since you can also wound and kill crew members, wouldn't it be nice to be able to kill the tank driver inside with one well placed shot through the viewing slot?
As you can see, there's more than enough space to fire through there.
And since you can also wound and kill crew members, wouldn't it be nice to be able to kill the tank driver inside with one well placed shot through the viewing slot?