I do mostly criminal law and I really don't see that as an issue. A tiny blade buried in my wallet, especially when it's along with things like a needle and thread and bandaids, is not going to trigger any concealed weapon concerns of a DA, except maybe for in federal court. Everybody in federal courts seems to have sticks up their butts, which is why I don't do federal. So, that's not an issue.

The problem I have with the solution, though, is that a tiny blade buried in my wallet is not nearly as convenient as the Squirt.