I think badspot is speaking from experience here
No, he has seen people make these kind of add-ons, which are very vulnerable to servers, making them less secure. Like as he said, it can do a lot of stuff if it gets to the wrong hands of someone. Such as the eval add-ons, you shouldn't even have one if you have no idea what it is and you are just giving eval permission out to other people.
I have seen injection vulnerabilities on servers using via eval. I don't understand why you would even trust them with eval, especially giving eval permission to smart coders, some are nice to help, and some are just wanting to destroy the server within seconds.