I don't know why scenario 2 should be any less worrisome. The distinction between "optimized for some perception/subset of you" and "optimized for someone like you" is completely meaningless.
Because of degree of focus. It's like the distinction between a black-hat scanning the entire 'net for vulnerabilities and a black-hat scanning specifically your system for vulnerabilities. Are the two equally worrisome?
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one. (Immediately before; refresh the list-of-threads page before posting.)
3. Open Threads should be posted in Discussion, and not Main.
4. Open Threads should start on Monday, and end on Sunday.