There's always the risk that the script will fail to completely download and leave your system in a broken state. This can be mitigated against by the script au

There's always the risk that the script will fail to completely download and leave your system in a broken state. This can be mitigated against by the script authors by wrapping everything in a function which is called on the last line, but how do you know they've done that without downloading the script and checking first? (Poetry have done this, for what it's worth)