Absolutely! Every person is part of the goal to have a worldwide tree!
You could orphan the profiles once you've added them so the amount of profiles (your watchlist) doesn't become unmanageable. Then they are here ready for an ancestor to find and explore, just make sure to add t least one source to each profile so as to protect the integrity of the tree.
A Streeter ancestor somewhere, although not related to you will one day be extremely grateful for the work you have put in :-)