This is my biggest problem with Facebook ads.

Many ads and sponsored polls are written in a way that make it unclear who’s behind them. If I click this where will I go? What’s going to happen with the data I provide?
Here’s a good ad:

It’s clearly from Mailchimp. Mailchimp is a full company name mentioned in the copy and in the image. And you could win a wrestling belt.
Here’s a bad ad:

WTF is FBI? Not that FBI, I think.