Yeah, amazon literally doesn't care. The only thing that ever goes wrong when you use Someone Else's epubs is it sometimes loses the cover art if you're connected to wifi. Nothing else ever happens
I'd recommend you switch instances if it's all porn and Chinese. Like see where people you like are posting from (as long as the server doesn't have mastodon in its name)
It's also an important trauma processing technique. If you had a shitty childhood like us, it's called reparenting instead.