Unfortunately, ad blocking has become a part of protection against malware -- especially for non-tech users.
Blame malvertising that loads exploit kits, and ads (on search engines and elsewhere with fake download buttons, etc) that point to pay-per-install malware, the kind of spyware/adware that's super easy to install and monitor-smashingly hard to remove, now the creators of those have gone as far as adding ring-3 rootkits to their dlls that hook into browsers.
Blame malvertising that loads exploit kits, and ads (on search engines and elsewhere with fake download buttons, etc) that point to pay-per-install malware, the kind of spyware/adware that's super easy to install and monitor-smashingly hard to remove, now the creators of those have gone as far as adding ring-3 rootkits to their dlls that hook into browsers.