Re: I guess this is lawyer talk for..
"so many local rags do it with all the pissing adverts and crap they have on their site to "make money". The amount of times you'll visit their sites on phones and get fake AV pop-up adverts. Some ones from up North I've had this happen with. All because whoever is coding their site, isn't checking the legitness (is that a word?) of the code they are embedding."
The big offender for this is ad auction exchanges like Google DFP. Occasionally bad code slips through the exchange's filters and wins up winning a bid and gets placed on my site like any other ad. It gets caught pretty quickly but never quick enough. But we're in to do nothing but review code, there aren't enough hours in the day for me to audit the code behind each and every ad served up via DFP.
Of course i wouldn't put a DFP ad slot on a payment page, either. I'm plenty stupid but I'm not that stupid