It takes one court order from the DHS to seize all your Ripple balances - because Ripple is centralized, and it's closed source.
More ridiculous fear mongering and FUD from you.
They can no more seize Ripple then they can Bitcoin.
At least one developer has a clause in their contract that the full source code can be released if anything should happen to OpenCoin. Since several developers and other parties currently have the source code outside of OpenCoin (presumably under NDA right now), it's almost certain that the source would appear shortly after any such shutdown attempt and that new rippled servers would pop up quickly. It'd be messy no doubt but not what you'd like to have people believe.
Sorry dude, Ripple is a scam. You should have read up on them before you invested. Value is zero and they will not survive. Hell, the only money the 'company' makes is dumping Ripples for BTC on noobs.