Well - while I like the movie, I'd also not want to see these slogans. I use ublock origin to get rid of unwanted content. I also simplify user interfaces a LOT. My default youtube view I have removed a lot of stuff from (hopefully one day I no longer have to use youtube; I don't want google in my life, but I haven't yet found enough motivation to degoogle my life completely); same with old.reddit.com back when I was still using reddit. So I think your proposal, while not bad in its own right, may not be ideal either - I'd not consider this an easter egg but rather content I'd want to block, so ublock origin would not do its job properly if it were to show this to me (and keep in mind I like They Live).

I had a similar problem with Nate when he abused all KDE users with his "donate-now-or-else" daemon (https://old.reddit.com/r/kde/comments/1f42sew/kde_is_asking_...).

I never ever want KDE widgets to pop up and pester me (that does not mean I have anything against donations; I have a lot against people who abuse the user base though, such as pestering them via unwanted pester-widgets. Sadly when you point this out on reddit, you get banned from #kde, same as when you critisize systemd on #linux - reddit censorship is out of hands).