What method are you using to predict what future governments won't find offensive/illegal?
Short of time travel, this seems impossible.
decimalenough
This. I have a watermelon costume purchased years ago for a fruit themed costume party, but today it's code for supporting Palestinians/Gaza and a picture of me wearing it might get me banned from entering the US.
qiine
hopefully with enough time everything will be code for something and therefore nothing will.
felineflock
Yes, it is not possible. We can't predict but can follow the trends.
Governments tend to want to be seen as a god-like entity protector/judge of all.
So they hate satire or anything that means they're not being taken seriously.
Just recently Brazil decided to jail a comedian, for instance.
Short of time travel, this seems impossible.