Eli5: Why is it so hard for social media companies to remove spam and Bot accounts?

Question

Eli5: Why is it so hard for social media companies to remove spam and Bot accounts?

In: 20

Answer 1

There is considerable overlap between the dumbest humans and the most advanced bots.

Bots are designed to act like humans just enough to make them blend in. Creating an algorithm to detect them automatically is difficult, because you risk banning actual users.