Game it out at the systems level. If the prosecution had to prove beyond the shadow of a doubt that what was destroyed would have been evidence, then destruction of evidence would be functionally permissible whenever done competently.
> ...either way this definitely is not the "sky is falling", "we're almost a police state" case that folks here are making it out to be. It's a very narrow and novel line.
Agreed. And activists should generally work with lawyers in order to be familiar with areas of the law they are likely to encounter in the course of their activism. Especially activists who travel internationally.