I would be surprised if the UK government tried to read - and implement - the legislation in the broadest sense any time soon. If you have an instance and are below the 3m MAUs, you're likely fine.

Until you're not.

The moment a Mastodon instance is found to be hosting content the OSA is meant to protect minors from, that instance will be investigated and explored to the most liberal interpretation of the law, and that individual is going to find themselves either implementing age verification, shutting down that instance, or fighting their stance in court.

Risk, as ever, is about likelihood, not just impact. How likely are you to find yourself hosting such content? Could you self host just for you and people known to you? Your question implies you want to set up a centralised instance with lots of people you don't know, but that's the exact scenario Mastodon is meant to counter, it's meant to be federated. And if it's just you and your mates, what's the issue? If you want to give children access, you're into another World of problems, so maybe for your own sanity - and arguably, theirs - just don't do that.

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constantcrying 4 days ago | parent [-]

>Risk, as ever, is about likelihood, not just impact. How likely are you to find yourself hosting such content?

The fediverse is full of material which is illegal in many countries. Especially drawn CP and hosting a node means that you may start to host that material itself, that is part of the fediverse.

IMO the risk of a life ruining lawsuit is very substantial. Law is complex and you are not able to figure out yourself whether you are actually liable, especially when there is so little precedent.

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PaulRobinson 3 days ago | parent | next [-]

The law is complex, but not vindictive.

You choosing to host that material is illegal. You finding yourself hosting that and taking action to remove it and aid the authorities, is not.

If I slip illegal content into your bag, the law may challenge your possession of that content, but if you can show you had no knowledge of possessing it and no intent to distribute and that in fact you've been setup, the law is going to treat you very differently to you obtaining that material and putting it in your bag yourself.

Servers aren't much different. It's what you do when you notice the problem that counts.

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constantcrying 3 days ago | parent | next [-]

Which percentage of your life are you willing to bet on the fact that a judge will come to the correct understanding of how the fediverse works and that your understanding of the law is correct in the eyes of the judge. This ignores the enormous cost you will have to bear regardless of the outcome of the case.

These are serious offences and you should take them seriously.

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whatevaa 3 days ago | parent | prev [-]

The burden of proof proving that you didn't know is on you. Good luck proving a negative.

	▲	PaulRobinson 3 days ago \| parent [-]
		It literally isn't.

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jszymborski 4 days ago | parent | prev [-]

You can always take a whitelist approach to federation, federating only with well-moderated instances.