The problem: There is a post that needs to be flagged here (now 10k+ only) and I'm out of flags.
The meta-problem: What should I do when I run out of flags (early) in the day, but see lots of crap?
wait? i don't wanna!!
Probably the best thing to do for the short term is add it to your Favorites and flag it the next day. In this particular case the post is from 2010, so it's not terribly urgent (I deleted it anyway, naturally). In the long term, keep raising useful flags and the number that you can cast in a day will go up.