User blog comment:Fistful of Force/Quick post: Supports, learn how to place wards on terrain./@comment-86.115.0.252-20130324125252/@comment-81.233.51.169-20130325114634

Did you even read the post? He said that he WON because the other team's support Leona didn't utilize this. How is that blaming the support for his losses? <_<'''

Also, it is not a bug. It is how impassable terrain was programmed to interract with objects/models that would be affected by said terrain. If it gets placed inside it will be pushed out to the closest passable terrain since it can't be inside the impassable terrain. Wards, Shrooms, Turrets, Champions themselves will all interract like this with impassable terrain, which probably is the reason to why the OP thinks that it should be common knowledge.