[ubernostrum]

I would like to see this change.

If Google's approach is encouraging or enabling fraud, I'd like to see to it they're the ones who are motivated to change their approach. Making them legally responsible for the actions of their algorithms, preferably with penalties steep enough that even they can't ignore the resulting fines, might not be a bad start.

[MaxfordAndSons]

It doesn't sound like they're encouraging it per se, and they do enable legit actors to take countermeasures. But there's no incentive for them to be proactive like you want, especially given that they are part of an effective duopoly in the space. I agree it's not a great situation, but the legal incentives you propose are basically delusional - if Google can't easily detect what spam is maliciously anti-competitive, how do you reckon a court is going to prove it thus and enforce a fine on Google for failing to do so?