I agree it is a strategy. But some have abused of this.
there is no abuse or cheating or whatever.
It's a game with specific rules, same for every one.
You can learn to use tactics if you're going for trophies or you can having fun play it simply and for whatever comes.
But there is no reason to **** down and moaning every time for knowing things (specially for the members of that forum who can have all the info).