Honestly, I think the best start would be to actually keep your identities hidden. Law is stupid when it comes to this kind of things, and law shouldn't be followed when it's stupid.

You can also look into implementing a warrant canary on your first post here, and on your website. https://slate.com/technology/2015/01/warrant-canaries-a-way-for-tech-companies-to-get-around-government-gag-orders.html?