Draconian IT laws mean that in many countries you could be persecuted for threatening national security as a blanket rule with indefinitely the long harassment called investigation.
It is that somebody might contact me in 10 years, and at that point I'll have no idea about the context or how to "defend myself" because I won't know what they're talking about.
Maybe it's far fetched, I don't know, but it's a possibility. An interesting thought exercise if nothing else.
Referencing 1984, Brave New World and that quote about freedom of speech that Voltaire never actually said make up the holy trinity of pseudo-intellectual posturing on the internet.
Yeah it was Voltaire's biographer who was describing what she thought was Voltaire's thinking at the time. Still a good quote though regardless of source.