That was my feeling too. I get *why* Gibbs did it (if he actually did), but it felt like it blurred the lines of "good guy" a touch too far.

Oh! That would WORK! Gibbs is particularly good at the intimidating, terrifying, you just got on my bad side and are gonna regret it-vibe. I'm not sure the scare tactics would have worked on this particular yahoo (untouchable spoiled rich brat), but adding an actual tail may just have done it.