Depends on your thread model:

Swiss police can see your proton mail if they get a court to allow viewing it. But the Swiss do not have a submarine, so underwater bottle passing is safe against them.

Combine both, and you are safe! Offline mails in a bottle should be a april fool's RFC any time now.

I would like to see some movie like unresponsible guy throws his bottle to somewhere than some natural power moves it.

And it's not like there is anything (other than submersibles) that might cause it to find its way out again.

Solids and liquids mostly don’t compress so as a general rule most can handle those pressures without experiencing any real mechanical stress, as they instantly provide a perfectly matching internal pressure that balances out the forces to zero.

It’s mostly things that contain gases that can get crushed by high pressure. Almost any type of closed cell foam for example, will either collapse to a small size or crack and crumble apart depending on how rigid it is.

Living things tend to get harmed by pressure changes because they have compressible gasses and/or biological compartments that contain things that experience phase changes between gas and liquid at different pressures.

Presumably it was open & empty, so it's just a piece of glass surviving...

I found that to be really bad writing

  When it comes to exploring the deep sea, unless you suffer from thalassophobia (the fear of large bodies of water), it can be quite fascinating.

What purpose does this serve, other than to introduce a word that has no future relevance in the article. It’s just an empty sentence padding the word count.

Fear of the sea not large bodies of water.

Thalassa! Thalassa!

(Ancient Greek literary reference there.)

We really need to do more adversarial interoperability. There should be a browser or at least a .onion site that blocks ads and bypasses paywalls.

Yes, it would be illegal - just like a great many good things in the past, some of which led to the law being changed.

The Decline of Deviance essay posted here a few days ago says people used to take legal risks a lot more often than they do today.

I don't see any ads on Firefox (Android) with uBlock Origin.

That site seems horrible though. Random words in the body like reddit are hyperlinks to SEO landing pages on the same site. And there must be a better (original) source for the story than this...

You should really use an ad blocker. The Internet is basically unusable these days without one. I block ad domains at the DNS level too, but the ad blocker is still necessary to remove the empty frames left, sad.

If you don't want to use an adblocker that's your choice, but it doesn't make complaining about it content that we want to read.

Not worth it for the $0.10 return. Put more down there to incentivize.

The bottle in question seems to be glass, so many of those questions aren't really relevant. Glass doesn't degrade much from UV light, or at all from biological activity, whether on land or under 7 miles of ocean. Glass is denser than water, so it sank.