> That hasn't been a thing for a long time
It’s still the law, was expanded under Obama and is used widely. It is used to control dissent at events where protest would be unsightly, much as the UK incident you brought up.
> Consider what you are trying to defend:
Consider that I didn’t defend it.
> It is used to control dissent at events where protest would be unsightly, much as the UK incident you brought up.
Arresting people for holding up a blank sign is very different and much worse.
> Consider that I didn’t defend it.
Do you agree it was a problem?