It's even worse, because it was network wide.
Teamviewer can be a business-critical application to many people, especially if you work from home.
Someone on the /r/UK thread about it mentioned that the reason they unblocked it is because their own service engineers use it, and couldn't do their jobs.
https://www.reddit.com/r/unitedkingdom/comments/5yf6lz/so_it_looks_like_talktalk_has_become_the_first_uk/deq8owt/
Biting the hand that feeds IT
