Started as a shower thought (literally in the shower), but decided to make it more open-ended.
My answer to this would be “watch future seasons of anime that I am waiting on”.
I don’t see how that could cause a huge ripple through time.
Let’s just say no one’s noticed anything yet
I wrote a novel where in future people time travel back in time to watch movies in the theater like the original Star Wars. It’s book one of a series.