You are receiving this warning because:
The list of what is ALLOWED here is broad. Wikialpha:CSD lists the kind of material that is subject to deletion.
The list of what is allowed includes (1) articles about scammers; (2) articles by scammers, whatever that might mean; and (3) it even includes articles that look like unrealistic puff-pieces, where someone has written an article about themselves, where they assert they are the greatest rapper in the history of rapping, in Bangladesh.
Please review Wikialpha:CSD. If an article triggers your concern, AND it meets one of those criteria, place a tag on it.
If an article triggers your concern, but it does not meet one of those criteria, your choices include: (1) POLITELY raising your concern, on the article's talk page, or the main contributor's user talk page; or (2) shrugging your shoulders and walking away.
It doesn't matter if material you see here triggers you to hate the author, or the subject of an article, you must be polite.
If the administrator who reviews your deletion tag does not agree with your concern, you can, POLITELY, explain your concern to them again, in more detail. But understand that what is allowed here is very broad.