Clear backpacks are not any protection against armed murderers attacking unarmed schoolchildren, but are definitely preventing freedom of speech, by exposing it against the will of the authors.

Anonymity is essential to free speech, and this is why Fakebook is the antidote to freedom.

The only reason I have a Fakebook account is because I have a pseudonymous account, and just to fuck with them. I hope you never learn how dangerous and contrary to public safety your views on censorship are, because if you do, it will be because you are too much of an outspoken free thinker for the worse communists in charge.

That would be a fate too horrible to contemplate.