[wsxcde]

> factories like this would WANT to disrupt the Bitcoin network

You're assuming the people disrupting the network for short term gain are the same as those who made the up front investment into the operation.

This is not true. GHash's past double-spend attack was carried out by a rogue employee. The BGP-hijacking attack which was in the news a few days ago shows another route to a 51% attack. An attacker who can trick a bunch of big miners to mine for him instead of themselves could just as easily have tricked them into performing a doublespend attack.