jgsugden
Legend
Again, that's not how a trademark would work.
Just for starters, they are trying to claim that the first use in commerce was in 2021. The first use in Stranger Things was at the end of 2017.
While people might have their issues with the USPTO, as far as I know, there are no successful patents for time machines, and I doubt that anyone is going to get very far with claims that violate the space-time continuum.
US20090234788A1 - Practical Time Machine Using Dynamic Efficient Virtual And Real Robots - Google Patents
A method for time travel, which allows an object or a group of objects to travel into the past or the future, as well as a method to cut objects from the past or future and paste them to the current environment. The present invention, called the practical time machine, requires teams of super...
patents.google.com
Putting that aside, this is absolutely how all forms of IP end up getting used - nuisance cases. Trademarks are not as lucrative (usually) as patents, but there are trademark trolls.

How 'Trademark Trolls' Are Trying to Make the Most of the Pandemic | National Law Journal
More than 600 applications have been filed with the U.S. Patent and Trademark Office seeking to register marks related to COVID-19. And the number of applications continues to grow, with many appearing to be “opportunistic” trademark applications.


Trademark Trolls Causing Menace Around The World: How To Tackle The Problem?
Trolls" in the trademark industry around the world are a menacing force taking undue advantage of the trademark registration process by registering…