You don't flag them.
Users write the queries.
Users write the titles and descriptions.
Sometimes they are right.
Sometimes they are wrong.
Sometimes they are broken.
If users had to promise that their queries worked, I know I'd never post one there.
Who exactly do you think will fix it? The guy who created it two and a half years ago and hasn't been seen in 2013? JQuery wielding Unicorns?
You can take that query, fork it, and make your own working query that does what it says. And then people will be happy. Or at least you'll be happy. And all is well with the world.
Ain't Designed for Polish*
Polish, not Polish. Just to clear up any confusion. Though I doubt it supports Polish either.
Queries are saved all the time. And you can't mark them as final. And it's a separate account. And so you end up with a lot of flotsam lying around. And that's fine. It is what it is.
Relax. Crack open a beer. Learn some TSQL. It'll do you good.
Just for your special enjoyment, I wrote you a working query that does exactly what it says. Sorta.