Bad decision if you ask me. Draft night reactions is one of an example not to take fans seriously.
I think this applies more to teams not in contention. They have to sell tickets, and this is a perfect way to to gauge that.
I don't know about "perfect". Blogs, forums, Reddit, etc. aren't a representative sample of a fan base. For instance, many folks on here were against having a dance team, but we now have dancers to appeal to a more casual crowd.
It's a tricky thing. A team should use whatever resources it has to gauge fan engagement. At the same time, if a franchise is letting fans decide moves, all hope is already lost. The great GMs are the ones who can make a move even though the fans won't like it.
That said, it's probably always good to have another source