Who's a good registrar that will contact me first if they get an abuse report?
If the user is going to be able to design + style the pages any way they want, having something in the URL to indicate it's still user content is important.
> How is abuse reported? Can I be made aware of reports of abuse before the domain is suspended?
And support responded:
> Abuse reports can be submitted to our Abuse Team via email using registrar-abuse@google.com where reports are analyzed and investigated further. Warnings are not given out, however, unless the reporter also reached out to the registrant of the domain in question. If a domain has been found to be in violation of our terms of service, the necessary actions are taken.