I try not to see many ads online. Generally they irritate me, and it's been extremely rare that the ads on non-search results have been selling something I'm interested in. (Those few times it's been because the ads were advertising a competitor to the site and product I was already looking at!)
I don't object to site owners using ads. I fully understand that many site owners provide services (such as this blog site) for free even though they incur costs such as hosting and machine maintenance. I just don't like to see them.
Regardless of the ethics in this debate, I was shocked to find out that not only does use.perl.org have ads, but that my last journal entry had a very inappropriate ad showing. My entry was about the challenges of getting more women into Perl and IT in general; not about picking up women from a dating site. I hear this is a common problem with Google Ads and feminist websites/blogs/content; as if the terms "female" and "women" can only be associated with dating.
I've complained about the ad being inappropriate (which you can do by following the "Ads by Google" link and choosing to give feedback about that ad).
This, more than any other thing is prompting me to get around to installing some blogging software on our server and moving my primary blog there. I expect to still cross-post here, as pjf does, but probably only my Perl specific writings.