I love Heroku. I especially love their sign-up process (give them your email address, click a verification link and you're ready to go). No captcha. No SMS verification.<p>What stops someone from buying 1,000 email addresses, and hiring someone to create a 1,000 Heroku accounts? You get up to 100 MB of slug space to run code and host static content.<p>Does Heroku not care about this sort of malicious behavior? If so, why do they not care?