The experience is more like "I clicked on a link to an article, but instead of loading the article, the HN page just reloaded. Now I have to scroll down to find it again... Hmm.. Where is it? Maybe it's moved to a different page...? What was I even looking for again? Oh well"
But holy* I have so may flagged posts that the list doesn't fit on one page. The latest one is from 2024/03 and oldest one is from 2020/06 (maybe that's when I started owning an iPhone, but not sure). And I don't see any reason why I'd flag any of those submissions.
I think it's very likely that the order of the text/link below the story title (on the frontpage) is to blame. For example:
> nn points by xxxxx n hours ago | flag | hide | nnn comments
The fact that links 'n hours ago' and 'flag' are right next to each other makes it very easy to click on the 'flag' accidentally.
So a +1 from me to do something to fix this problem.
That said, it's possible this is all accounted for in the system. Maybe the mods only get notified above some threshold and that threshold has been tuned to ignore the background noise of accidental flags. Adding a confirmation would lower the noise level, but perhaps not translate into any real benefit.