I predicted a showdown between users and advertisers back around 2010, and every year since, I've been surprised it hasn't happened yet. Malicious advertising is probably the biggest driver of AdBlock Plus growth. Anecdotally, we just had another customer get hit by a remote computer service scam because she searched for something like "canon ink technical support", and an ad was listed at the top with an 800 number…
This this this. There are some huge players in the online advertising world who are supposed pillars of innovation and sustainability, but they have really failed at keeping sketchy, scammy, or downright malicious advertisers away. Inaction here will kill their industry. Google ads look like results and link to sites with malicious software downloads. iOS apps are full of "you have one unread message!" misinformation…
That's the part I'm less certain about. I would've expected it to happen already; they're hurting themselves, but so far not fatally.