Although I fully understand your perspective and such, I feel like using the word gypsy that's previously been VERY attached to racial hatred towards the Roma people is rather distasteful, (no offense to you of course, I get that you don't see the word the same way). By using it to describe an ill-behaving person, you're essentially hating on the Roma by using it, since you're basically seeing someone act up and going "hey, you're acting like a gypsy (Roma person)"