> what's your solution to combat scammers?

I'd wipe the Play Store off the face of the earth. Have you looked at the garbage on there that Google considers legit?

This: https://news.ycombinator.com/item?id=47447600

is is the shit people are exposed to when they go through the Play Store. You don't find that on F-droid.

The second thing I'd do to combat scammers is the same thing I'd do to combat child porn and disinformation: educate people. This silly process is a technical answer to a social problem, and those rarely work well.