My counter would be that broken blinds are self-evidently broken, and the owner knows that they don't serve their intended purpose.
The same is not true of broken computer security, where usually the owner believes that the security feature does its job.
I'd say a better analogy would be a lock. The owner believes that the lock works and will keep people out. The fact that the lock can be picked doesn't mean everyone should expect their locks to be useless, nor does it allow the police to pick a lock to get into someone's house without a warrant.
The same is not true of broken computer security, where usually the owner believes that the security feature does its job.
I'd say a better analogy would be a lock. The owner believes that the lock works and will keep people out. The fact that the lock can be picked doesn't mean everyone should expect their locks to be useless, nor does it allow the police to pick a lock to get into someone's house without a warrant.