[porlw]

I'm not so fussed about ads I can ignore, but (along with analytics and stuff like social media buttons) - they all add latency to web browsing with extra DNS lookups and HTTP requests.

It's especially bad on mobile.

So no matter how nice, useful or relevant the advertising is, unless it's hosted on the site I'm visiting, it will probably be blocked.

[malka]

on mobile, my service provider (free.fr) offers ad block on ISP level. Very nice feature, my only concern is that it is an opt-out choice.