This has never worked on reddit and there's no reason why it would work here. That's why subreddits had moderation and things that were posted in the wrong sub got removed.

Yeah that would not work, since a lot of people are in the US and have no consideration for other countries. I don't see how this is relevant to a community about technology. Sure, if they were using some cool and new technology, or a major law had changed, or even an article about how this works, it would be relevant. But this seems like a US-only PSA that doesn't really tell us anything.

Using upvotes only to moderate this type of content will just result in the Reddit issue, where a lot of general-purpose subreddits (like Politics or News) were completely dominated by US topics.