The funniest thing is that this doesn’t strike me as a terrible idea, though maybe it looks bad from a marketing perspective:

“Look, if you’re trying to sell DDoS services, go right ahead, demonstrate your ability on our infrastructure. That way you’ll also know not to target our infrastructure”

But at the same time that might genuinely be a positive for the net. Just like the drug epidemic — you can’t stop people from doing it, but you can reduce the potential harm