FWIW, Tesla includes easter eggs in its cars. You need to go out of your way to use them, and they're pretty much hidden unless you go looking for them, and they keep adding more via OTA updates.
If your question is "Who are easter eggs made for?" then the answer is "the people that care to go looking for them." The difference between a Tesla easter egg (which are almost entirely regarded as delightful) and this easter egg is that this easter egg was poorly executed.
A Tesla easter egg is silly and whimsical. This easter egg parodied something that's potentially threatening. And hell, Firefox has had easter eggs since its first release; go visit `about:mozilla` in your address bar. Saying easter eggs are bad outright is silly, but they should be done in a way that isn't concerning to users.