I've seen this post on Movies and TV meta. We could have our own rules that we can define here.
I think it's a good idea and it could spice up the activity in our community. Is anyone interested?
Topic challenges are fun. They are already on many sites, like Puzzling, Worldbuilding and Movies and work well.
Additionally, I'd give a bonus to anyone participating, like a badge. (Eg. 5 upvotes for bronze, 15 for silver, 25 for gold. Same goes for question views):
You've earned the "Topic enthusiast badge (ask a Topic Challenge question with a score of 5 or more)"
Oh, ye gods, yes....
Anything to stop the constant useless churn of
...to which the only answers are usually "Soundhound/Shazam" or "we don't know or care"