First, while much of the information might be common-sense, it might not be to potential adversaries and I see no reason to provide further aide.
Second, revealing documents like this helps prove what FBI isn't doing. When trying to plan an effective counter to surveillance, it can be just as important to know what isn't be tracked as well as what is. Again, I don't see a public good here.
I simply don't think there is an overriding good that outweighs potential downsides (even if small). Revealing this document does not show moral or legal problems. All it does is fulfill curiosity. Which isn't a good reason for leaking information related to national security.
Does it?
What the hell?
You'd be surprised, or perhaps disturbed, by how many kids put "is a Muslim" on their list...
They have it on posters in transit hubs, stadiums, airports, all over the place.
Americans live in this constant state of paranoia about things like this.