You are the guardian of your list.

Do not treat your list as something casual. If you don't care about your list and feed them things that are irrelevant or harmful, your list is going to shrink. You need to assume, if you want a good list, that people will eventually take your recommendations on faith and act on them. If you are careless in how you build it, and don't do the due dilligence for your people, then you will end up having people blacklisting you, and even possibly bad mouthing you to everyone they know.