Hmm?

I have seen a lot of signs stating no skateboarding or biking but never a sign that says no scootering. I find this interesting as this is the only place where me and my friends can jump 5 stairs and it is the first sign I've ever seen prohibiting me from scootering. I hope these signs don't become popular. I understand why they dont want us riding there but then again it wasn't a Sunday and we were only in the parking lot.
Please tell me what you think about this.
Thanks, Guppy