What will happen if a teammate keep buying and keep the observer ward in his stash?
Collected as many as he can and then sell it?
Or, let the enemies to deny it for gold?

I had notice that the Dota 2 team or Valve always don't want to receive or read suggestions from the public or players, I guess by spreading the bug across the Internet is one of the way to make Dota 2 improve or get better.

Good luck, Dota 2.