[tfsh]

I've been PSAs before on the front page with a reminder to check your flagged stories. I and others visited the link and were surprised to see how many stories I had fat-finger flagged. In fact I had never intentionally flagged a story yet the list was at least 10-15 long

[tyre]

Wow I checked mine and had about 20. I've never intentionally flagged a submission as far as I can remember and none of these were even close to flag worthy.

[beala]

I've apparently flagged 6 articles and 1 post by accident.

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.