We could have a real conversation about tradeoffs (and maybe this one isn't worth it!) but not if you just assume/pretend the worst-case scenario is real. I'm Australian and I'll happily bet that N years from now I'll still be able to criticize the government without being debanked or sacked.
If we do ever fall to authoritarianism, I doubt this will have been a crucial step; it's already easy for the government to deanonymize most posters if it wants to, and an evil future government that wanted to go further could probably just... do it, regardless of precedent.