Yep, me too.I just watched the kids show, 'Minutemen' and it showed making changes that altered the newspapers and lives of some. Finding that time travel 'rips' the fabric of this dimension - causing a 'black hole'. Well, whatever - with the shows I've seen on this subject, they're limited to how 'far back the traveler can go.' I find that interesting, because there's a Greater Law that they've yet to 'master' - just like the dome (firmament) concept. The more recent version of the movie 'Time Machine' remember the guy couldn't save his fiancé - each time he tried she died at that same time some other way. Certain things can be altered, other things, not.
No matter how they try they cannot seem to get around the rules. It is really interesting. Good thoughts.