I am regularly called (11 times) for Jury Duty. I have been non-selected once, have served in ten trials, all as foreman. I have the habit of showing up to Jury Duty in full kit. Until 2001 that included the sgian dubh. I was only questioned about the kit once, and I answered the lawyer that I preferred to be dressed in formal attire to reflect the formality of the proceedings. (The lawyer was a slob.)
Enjoy the trial.