Using a knife or something, you could type "cut x with (blade type weapon)" and watch cuts appear on the wardrobe. Drop that shit back in the container where you found it and then watch your rival put it on, not pay attention to their clothes, and then they walk out full of holes. Now they look dumb and it's thanks to you!
Yeah, you can fight them and do this, but this is more about the element of surprise and damaging someone's clothing. It's also useful when you're in a spot where you can't engage in combat. Engage in petty vandalism instead!
The wardrobe must not be worn for this to be done, is my suggestion. You should have to find that person's stuff and do this when it isn't on their body.