First off, I'm glad you brought this up - I had it in my mind to contact you upon seeing those flags, but got distracted.
Let's talk about closing...
That's how the question you flagged appears as I write this. The author who asked it (3.5 years ago), the last editor, and those who opted to close it are all prominently displayed. Nothing is being done in secret here; everyone who has worked to bring the question to its current status is either immediately visible, or one click away in the revision history.
Now look at this one:
Again, we see the names of the author, the last editor (same as the author) and the person who closed it. However, there's something missing here: Bill didn't close that question because he was idly browsing the site and came across a poor question - he closed it in response to a moderator flag. But that isn't publicly visible. As far as the rest of the world is concerned, Bill alone felt that question should be closed, and Bill alone took action to make that happen. This is why the current election is such a big deal: moderators end up shouldering a lot more responsibility for what happens on the site than normal users. If someone incorrectly flags a question to be closed and a moderator closes it, the flagger never gets called out; indeed, they may never even realize their mistake.
So it's important that:
You don't dump actions on the moderators that you can handle yourself. I came across one of your flags - marked "helpful" - that asked for a question to be closed which was NOT a recommendation question but merely included the word "recommend" in the title. It needed only a small edit, which the moderator responding to the flag dutifully made. You could've easily done this yourself.
You do as much as you can to resolve a problem before bringing it to the attention of a moderator. You've now flagged dozens and dozens of questions with this same, copy-pasted message. So far as I can tell, you've made no edits to any of these, left no comments pointing out issues or encouraging the authors to improve their questions, cast no close votes, and done nothing to help the moderator responding quickly understand how a question that has been around for years, positively received by the community, with in some cases thousands of views... is suddenly in dire need of being closed.
In fact, I rather doubt you're even reading these questions - the results show all the signs of someone searching for "recommend" and pasting the same text into the mod message. I could write a script to replace you in under an hour.
I'm looking for an up-to-date book that teaches technologies like RDF, SPARQL, RDFS, and GDDRL- and frameworks to make use of them. Any recommendations?
This isn't a great question... But it's hardly terrible. The author has a specific problem, which he took time to explain, and the answers attempt to answer. I wouldn't have closed this. I didn't close it, after your flag brought it to my attention and I took the time to read it. Therefore, it was not a helpful flag.
Perhaps, if you'd taken the time to explain the problems you saw in that question - if you actually saw any problems apart from the word "recommend" in the title - I would've done something else. You could've left a comment, or put something useful in the moderator message...
But you didn't.