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Attack of the week: Airdrop tracing – A Few Thoughts on Cryptographic Engineering
(blog.cryptographyengineering.com)
This is a most excellent place for technology news and articles.
On the bright side, it only affects people who actually use the feature, so as long as your friends aren't being actively followed or AirDropping something in the middle of a protest, you're probably fine.
It does, however, mean you might not want to accept random stuff...