Don't worry about the "noob" that decided it was a good idea to downvote all your posts cause he didn't agree with this one. I checked steemd.com and it was apparently someone with very low SP so you shouldn't worry about it too much.
But everyone has a right to express its opinions, if they are wrong and facts arise that prove differently, then the one with the opinions might change them in regards to it. But flagging someone just cause you don't share the same opinion is frowned upon, and shouldn't be used that way at all.