Ducttape: No, it worked real well whether carrying a spare magazine, flashlight or other items. It has a very good "elastic" and velcro closure and the body is elasticized as well.

Canoedogs: When I bought it, I still was a "real" cop. I retired three years ago. Frankly, depending on how and what it's used for, it doesn't "print" much at all. Also, cops are concerned with weapons or things that they feel are a danger to them, not with the fact that you are using an "ankle pocket" to carry your passport, money or sundry items. Naturally, if they are suspicious of you to begin with for some reason they'd be curious what you were carrying on your person regardless of location.

Wouldn't it be easier just to add a cell phone pouch on your belt for this?

Yes, but ID and money are slender. Two altoid tins strapped to your ankle on the other hand is a bit bigger- sooner or later someone is going to think it is a drug stash. Or that you want to FedEx yourself to your deity of choice and bring some unwilling company.

Sometimes urban survival is about not being noticed. By anyone. This isn't blending in. This is trying to be sneaky in a manner that when it fails, it's going to fail hard.