I agree with the sentiment, but in this case, the police raided a private business with probable cause, and will hold all assets of that business as possible evidence in a criminal investigation. If your car is found full of drugs, they will also impound it and inconvenience the other possibly innocent passengers. If they find a body in a storage facility, they will probably deny everyone else access to the facility until they have gathered all the evidence they need.
If your car is found full of drugs, they will also impound it and inconvenience the other possibly innocent passengers.
While we're coming up with analogies, this seems more like impounding all the other cars in a public parking lot because a percentage of them had drugs.
If they find a body in a storage facility, they will probably deny everyone else access to the facility until they have gathered all the evidence they need.
Shutting down MegaUpload isn't to "gather evidence", it's a punitive, open-ended action.
But if you knew 60% of the cars had drugs, and knew the parking attendants were mixing in drug and non-drug bearing cars to hide the cars with drugs, then I suspect you could get a warrant from a judge.
That's a reasonable argument to make, but there's a difference between a temporary inconvenience and permanently losing data. It's not yet clear which of those this will be.
Unless the MegaUpload business continues to operate somehow, I can't imagine how they would allow people to access their data once again. Would the police run the business so that people can get their data back? Hard to imagine them absorbing the cost of doing that.