Even on HN I've pleasantly told people to please disclose affiliate links (that I've only found out about because I click them and uBlock blocks the page from loading completely due to malicious amounts of tracking scripts) and people get upset about it.

I wish they would overdisclose here. It does not help that on social media, lots of people think adding "#sp" is enough.

If they're American, merely adding #sp is an open and shut violation. That should be reminded of the consequences of failing to disclose