The problem is that so many sites have absolutely no shame about how many or what kind of ads they will jam into a page. LA Times is a great example - https://nelsonslog.wordpress.com/2017/03/25/la-times-and-ads...

If a site is willing to treat their consumers that badly then fuck them. I have no respect and will not feel bad about using an ad blocker there.

On the flip side, a number of sites have started asking to turn off ad blockers (e.g. Wired), and if it's a site I visit frequently I'm willing to give it a try. If the page is filled with video ads or blinky shit, the ad blocker gets turned on again.