While i get the pain of users, i've observed that habits stick and only a weak 5-20% of the learners actually drop convenient-but-insecure habits (downloading untrusted files without inspection beforehand) because convinence always wins over. I wouldnt change the system but definitely mention (more than once) the risks involved with what they are doing at the moment and to inspect the code later when they learn more.

While i agree, the issue is the target audience. If this was directed at more technical and knowledgeable tech-savvy people one-upping their game, i would be very glad and thankful for a shell script. However, its not. Its a potential starting point for being, in cool nerd terms, webmaster, and that has its own set of responsibilites and habits, habits like not downloading files and packages without checking first. While some might change the habit after learning more, i doubt that many will do that.