Understood, but at the moment, you can't even do that because you can't delete DMs through the user interface or set controls on who can send you DMs. Until we get options in lemmy that let people take control of their own approach to spam DMs, this is the best we can do, because unfortunately, "do nothing" just means spam impacts everyone, and given the nature of some of that spam, that's not an option.

Edit - I just noticed you're not a blahaj lemmy user, so this won't impact you in any way. It's specific to users of this instance