Time to add a regex based filtering system, both server controller and client controlled.
A few games have introduced the client controlled filtering but theirs tend to be rather simple and low quality. In most of these they allow you to auto-hide all messages with specific phrasing like in this case you would put “P2PAH” as that is very very unlikely to be used in any normal speech it would rarely cause false positives
However a few games have allowed for custom regex filtering, though none of them have come up with a decent UI to add these and make regex accessible to regular people, you tend to have to edit a text/ini file hidden away for these games.
If Amazon could produce either a nice UI to allow people to create regex filters without the need to understand regex users could pretty quickly block these spam messages.
The other option is to allow advanced users to submit regex filters to Amazon of which Amazon can then quickly check the submission and pass/deny it based on whether or not it’s likely to cause false positives. This option could be added to the Report User button.
That way Amazon can get some assistance from those of us who know how to create some safe regex and hide the spam sooner than later.