[alexjplant]

There's a legitimate reason for doing _almost anything_ - it's a question of likelihood, impact, and knock-on effects.

I can only imagine how much taxpayer money has been set on fire by developers having to debug single-page applications running on these systems without the aid of Dev Tools... these types of material wastages are created in an imperfect attempt to prevent the mere possibility of something that could be more effectively mitigated through training and web content filtering.