Why can't they auto-block RMT posts?

[Bacent]

Seems that my main activity is reporting RMT spam when in main cities, and I constantly see the SAME text in them all the time, like "Gil & Eukera level & Gear 390"

Seems to me that Sq Enix could write software to monitor player reports, and once ten reports have been submitted on ads that contain the same text, start blocking all that contain that text.
Yes, the spammers will just change the text by one character, but they'll have to identify what part is triggering the block to change it, and eventually, they may run out of ways to get their message across.

Do you not see the weird characters they use in their posts? They could use anything from any language out there that remotely looks like a letter for their advertisements

Beta - β
Eta upper case/lower case - Η / η
Epsilon lower case - ε

What you're suggesting could only add problems to the game if they start using normal text players use all the time.