How can posts be reported?

If you want to report spam messages, then please create a question in the "Launchpad itself" area
https://answers.launchpad.net/launchpad/+addquestion
with a title that starts with
[Spam report]

Remark: For the current spam attack this has already been done,
https://answers.launchpad.net/launchpad/+question/810565

Unfortunately, there's no easy "report" button you can click.
Back when I was more active here, I got tired of all the spam, and making a new topic/report for every individual spam post, and then waiting for a Launchpad admin to respond. So I created a "SPAMalot" project, and then I could instantly quarantine spam topics with a few keystrokes, and remove it from my sight (and others').

Thanks for helping.

🤦‍♂️