Because kitsch apparel essentially refers to one-of-a-kind items of clothing, clothing that is quite unique, it takes no great leap of logic to conclude that by wearing kitsch fashion, you are being individual and rebelling from the accepted norms without going as far as getting piercings or tattoos. What is perhaps most important when you're wearing kitsch fashion is to realize that there are no rules as such, only common sense. Otherwise, this is one of the best ways to express your individual self without having to be out of this world, poetic, musical, or particularly artistic in general.
The idea that clothing may be used as a means of expressing one's individuality is not at all a new concept - it's been around for ages.
However, fashion trends tend to spawn off-the-rack clothing that could only be thought of as clones of each other, and thus, limits the possibility of originality when it comes to expressing one's self through one's clothes. Wearing kitsch, costume-y articles of clothing is one way of departing or escaping from a world where everyone is wearing the same thing by further limiting the possibility of wearing something that someone else is wearing. To wear kitsch clothing is to open one's self to the idea of style customizations. It's actually very freeing, if you think about it.