All the owners of the site would need to do is add this line to their HTML
No.
If they're in a situation like this, it's incredibly unlikely that anyone has the knowledge necessary to do this, let alone the time, inclination, or (perhaps most importantly for enterprise companies) business approval. The vast majority of enterprises cannot just publish production code at their own discretion.
No.
If they're in a situation like this, it's incredibly unlikely that anyone has the knowledge necessary to do this, let alone the time, inclination, or (perhaps most importantly for enterprise companies) business approval. The vast majority of enterprises cannot just publish production code at their own discretion.