You are still trying to pretend that accessing HTTP server once and burying it under an avalanche of never-stopping bot crawlers is the same thing? And spam is the same as "sending an email" and should be treated the same? I thought in this day and age we're past that.
If you're trying to say DDoS, just say that.
DDoS is a very specific type of attack. To be abusive, you don't have to do exactly that - it could be any type of DoS, and in fact it doesn't even have to deny all service - it could just impose excessive costs, for example.