Honestly, shame on you for the inaccessibility of this "feature" showing up automatically. Users with dysautonomiadysautonomia or sensory sensitivities just had their day ruined by this 3D glasses filter because of vertigo, migraines, and meltdowns. An April Fool's prank isn't funny if it leaves a lot of your users in pain or left behind. Doesn'tIt doesn't matter that we can turn it off,off; we already saw it and feel ill instantly.
Don't you have some review for accessibility, diversity, and inclusion before implementing anything, including pranks?
Edit: It has come to my attention that the default filter is randomized, as some other coworkers saw a different filter by default. At the very least, stackoverflowStack Overflow should select the least intrusive/most accessible feature to be the default one to show to all users.
I could have enjoyed the prank too if it did not make me feel ill while I frantically searched for a way to turn it off. This is not just a minor annoyance to some of us-- it can cause real physical reactions.