Arch Linux Blocks New AUR Registrations Amid Malware Cleanup

Which is not much different from the disclaimer about GURU, though GURU does a much better job at explaining the risks involved in using it:

Disclaimer

Please note that the GURU project is maintained and reviewed entirely by Gentoo users. It is only subject to minimal supervision from individual Gentoo developers, and is not supported by projects such as Gentoo Security. While our Trusted Contributors do their best to keep GURU safe, it is possible for it to contain vulnerable, badly broken or even malicious software. You are using it on your own responsibility.