Hi there, I'd like to hear from other instance admins who have instances with public signups what you do to prevent spammers from clogging up your hard drive. I appreciate all the security and privacy features of Cryptpad, however they also make it harder to control the flow of traffic to public instances. e.g. there's no requirement for email addresses, no ability to monitor new signups to see if there's a sudden surge in registration, etc. It would be nice to at least have a captcha option, though I understand there may be privacy concerns about existing captcha solutions.