If so what makes community/universe less safe? Is there less testing or is it simply less safe because more people could put malware in them.
1 Answer
No, it shouldn't scare you if you're worried about safety of packages. Though I do not recommend using it since it's not officially supported. Universe is community maintained software, that is to say "not officially supported software".
I recommend you read this article so you'll understand the differences between Main, Restricted, Universe, and Multiverse repositories. Good Luck