I think all of us have guessed, suspected, or somehow known that EH had an enemy in the ranks from the start. The lack of advertising and frequent preemptions in the beginning were bad enough - but the lack of reruns, the treatment of the DVDs, even the fact that they waited until the last minute to contact SG to notify him of the nonrenewal - somebody has been trying to bury the show from the beginning.
The best guess I can come up with is that one of the episodes his too close to an uncomfortable truth for someone - a biomed company, the military, something, and they were fighting to hush the entire series up so that the issue did not receive excessive publicity, causing the public to think on the subject.
To me, someone simply not liking the show might have had the same overall result - the nonrenewal - but the series wouldn't simply disappear the way EH did. What happened to our series struck me less as simple dislike and more as an act of deliberate sabotage. And I sincerely wish that I'm just paranoid, because if I am and it's just a case of dislike, we actually stand a chance of shopping it out to another network.
Quis custodiet ipsos custodes?