Archeologists actually dig up a lot of sex toys, believe it or not. That won't get you noticed.

A time capsule with something that nobody else will think to preserve might do it. Way too many preserve things the future is actually meh about. I wonder if a weird data footprint might be even better at this point. Like, if you filled out some official form thousands of times just for fun, and someone a long time from now is doing analysis and turns it into a meme.