I’ve got stuff I don’t want to be public, but at the same time I’m not going to spend thousands and thousands of dollars on security measures to protect it because it’ll probably never be required, and it probably won’t work anyway.
Having a pin code longer than four digits is probably more than enough to effectively deter the average cop, and they are all I am ever really anticipating interacting with, if at all. If I decide to take up terrorism as a hobby I may reconsider.