Gap Teeth and Huge Sideburns

Okay, when they gave Riddler stupid gap teeth and ridiculous sideburns, I was peeved. I like Riddler, I wanted him to (for one of the few times in his career) be treated with a modicum of respect. But no. Instead, we got this:

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I was a bit angry. But Riddler didn't make too many appearances, so I tried to ignore how glaringly idiotic he looked and focus on the more charming aspects of the show.

But then, they crossed the line... Beast Boy, another character that I really like, has received the EXACT SAME TREATMENT.

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Pretty much proving that this potent gap-teeth/sideburns combination is their recipe for Stupid. So why? Why do they continue to use it? To defile established characters with it?