Things get tense when ad-supported companies have to make money. When I ask my mom or dad to click the first Google search result, they click on an ad. When I ask them if they realized that it was an ad, the response is "no". A good portion of the ad business is confused clicks/taps (it's worse on mobile).
As someone who has worked on all three sides of the equation (selling ad space, brokering ad space, and buying ad space), I can tell you wholeheartedly that ad purchasing companies do not want these clicks. They're paying for something of no value. I don't know how companies can be convinced to do ad placements like these, or if they simply rely on getting enough conversions from accidental clicks from unknowing user…
In the end, the advertisers don't really care (at least if they understand the math, which many don't). They care only about their ROI. If they pay 20 cents a click and make 40 they're happy, if not they aren't. Sure you could perhaps get rid of all the shaky grandpas, pay 40 cents a click, and make 80, but it's the same ROI.
What you really end up with is a cottage industry of people making websites that can convert shaky grandpas better than real advertisers because just like spam, some non-zero percentage do convert. That's why you see some stupid ID fraud ad there. Shaky grandpas are terrified of the evil hacker who wants to steal their identity.