Is it? I certainly don't do that. We have access to multiple well known and reasonably well designed distribution mechanisms today. Anyone going the curlbash route is doing so of his own accord and with zero excuse if his known bad choices bites him in the ass.

(For the record I have nothing but disdain for those that choose to go this route. Looking at you rustup home page. In contrast LLVM has the decency to provide an apt repository for nightly images.)