Parents using a "gag" gift to teach an unruly kid a lesson good, bad, or neither?

What would you think of parents who will give a kid (11yr) a “gag” Christmas gift as a lesson that being a spoiled brat-like snot the whole year has consequences? If while all his brothers and sister get toys he gets a year supply of dental floss, classics books, a belt etc, if he thought that was all he was going to get the toys hidden away in the attic not to see the light until Boxing Day would that hammer home the point to behave and be respectful or fan the flames more?

Disclaimer: No it ain’t me either.