When I tried this once (literally one flag on one post), for the same thing (different tag) months ago, I was essentially attacked by an auto downvoter on every post I made until I removed the flag.
I don't touch the flags anymore. My reputation is important and after that snafu I don't want to risk it. I'll report in chats and stuff, and leave it up to accounts who do that sort of stuff, but not those flags from me anymore. Eesh.
I also heard a lot of, "What gives you the right?" Kind of stuff. Almost drove me away from the platform completely. Those flags are dangerous territory.
This is exactly why I think this sort of policing should be a team effort.