[alexfoo]

> > arrested in the UK for holding blank signs within vicinity of Palestine marches.

> Got a source on this one?

Not quite arrested but the closest I can find is someone threatened with arrest if they wrote certain things on the blank sign:

https://www.independent.co.uk/news/uk/home-news/anti-monarch...

The UK Police seem to have switched to a policy of knowingly arresting people erroneously and then releasing them and apologising afterwards.

(At least it is just arresting people and releasing them rather than shooting them and then apologising afterwards whilst also exonerating the officers involved.)

The article does link to an incident in Russia where a protester was dragged away for holding up a blank sign.