I wouldn't consider myself a pro. Just middle of the road, really. Things like flag locking should come very early on. I'm glad for the existance of this guide, since it means a few newbies might actually get the idea without me having to RAEG IT OUT TO THEM, but who's going to be looking at these sites anyway? Probably people who are looking to crack the depth behind the game, and chances are that they're not the ones who don't know to lock flags.
I say just make the flag lock item in the shop have a big neon sign pointing to it. Might get the point across better.