According to a comment on Workplace Meta, the ads experiment will be running for a while:
@DavidK The experiment will last 6 months - so most of the this year. We're planning a recap at the end to talk about what we learned. – Juan M♦ 1 hour ago
There have also been many reports, both on that question and here on Meta.SE, of inappropriate ads. You've asked us to report these, but reporting is currently hard -- the least-bad way seems to be to take a screenshot, upload it, and add it to an answer. That's cumbersome, so a lot of problem ads will never be reported. (For example, I'm not sure I could work out how to do that on my tablet.)
Since this experiment will run for half a year on several sites, please add an easy way for us to report problems straight from the page where we see the ad. A "flag" link right below the ad that pre-fills the ad ID or URL and lets us choose a reason would be fine. I imagine something like the flag UI, where you have several canned options (animation, inappropriate content, inappropriate product...) and an "other" with a textbox. If I understand correctly, the Stacks UI that you're using for flags and close votes now should make this UI easy -- you just need to figure out how to capture the ad ID or target URL and stuff it into the submission, and (of course) send that submission somewhere useful.
I know that developer cycles are scarce and feature requests usually wait a long time to be addressed (if they're addressed), but this is time-sensitive. Please help us. Reporting bad ads to Google does absolutely nothing (I've tried), and some of the other ad brokers don't even have a way to report bad ads. If this is an experiment then it's important to capture all of the relevant data, which includes reports from users about bad content.
A while back we were told that sites couldn't link to external resources in the Community Bulletin because there is no way to report inappropriate content and otherwise police it. The ads experiment is a big pile of external content with the exact same lack of ability to report. If we don't even trust our moderators to curate external content without guardrails, why in the world are we trusting ad brokers to do so?