Thank you! Very cool.
Several years ago, I was in a discussion with someone who claimed humans would never travel outside our solar system.
One means of doing so, I suggested, would be to hitch a ride on (colonize) some interstellar object. Their reply at the time was "there's no such thing, and bla, ..."
These recent discoveries have increased the possibility my original idea may actually have merit. Certainly it proves the other guy/gal, in my past discussion, was wrong! ;)
An other possibility, because these objects demand to be investigated, would be to plant evidence of our existence on them. Perhaps even a radio beacon powered by a radioisotope thermoelectric generator (RTG), using maybe Americium-241 with a half-life of almost 500 years, and designed to power up the transmitter periodically for several thousand years.
Meanwhile, I hope these newly discovered visitors aren't a prelude to ever increasing numbers, eventually putting our tranquil passage through this a quiet corner of space in jeopardy!