If you want to pass stuff on stuff so it will last for ages, then: Get it done already. Print it, email it, post it somewhere and share links, have it framed and then delivered by a singing courier -- however it is done, then just do it and get it over with.

Now it's their problem to take care of, ignore, make fun of, or whatever, which was always ultimately going to be the case anyway.

This allows you to back with living your life while you still have one.

There's little point to bothering with predicting what the future will look like after you're dead, and even less point to trying to influence how others will behave on your behalf.