There are multiple channels I check throughout the day for reports. When I woke up this morning, there were three separate reports of this one (this is the second account they've made).
Please don't assume someone else has reported something. Personally, I don't mind reports from multiple channels.
For users or posts on lemmy.world, at least, if it's in a larger community, the mods are likely in a Discord server that can help bubble/filter that up to admins here. Or at least me, as I try to keep an eye out there. If you're sure someone is breaking instance-wide rules (like this spammer), that is something to raise to our attention, please. (If it's community rules, that should be reported to the community moderators). You can PM me, although when I'm away or sleeping that will delay action. I'm actually not sure which channel(s) my fellow admins would prefer I recommend, but if nothing else !support@lemmy.world is one of the ones you can use.
We're all volunteers and some of these things can take some time to deal with, so I just wanted to ask your patience sometimes and jsut remind that you see the stuff that slips through and not the stuff we're catching before it gets to you. :)