If google moves forward with this we should all start randomly clicking on ads until advertisers start to realize that they're basically throwing their money away on advertising that doesn't work :) Let's hit 'em where it hurts.
That said it probably wouldn't change marketing budgets, just what people pay CPC/CPM etc to offset the percentage of users doing this.
1. https://adnauseam.io/ 2. https://adnauseam.io/free-adnauseam.html