I think this discussion has already gone the rounds on HN multiple times, and it usually gets pointed out that running any installer at all has more or less the same risks as pipe something from the internet straight to the shell -- while this looks scary, it's actually no less safe than how we install any other software.

I agree it doesn't look ideal and may not be best practice, but what do you feel is a better realistic alternative? What is the main issue for you? Is it the lack of a hash or checksum to verify what you downloaded, and make sure you didn't get a malicious site or a compromised package?