Mirror applications that don't advertise for the big names comes to mind. Using digital transactions via a medium like crypto currencies as opposed to credit. Obscuring things like online surveys by simply picking random choices. A flood of reviews with unintelligible reasons for their random ratings - mainly just flustering would-be-customers, especially on Amazon. DeFi in general, really. If you examine buying patterns, you can really fuck them up in their money laundering schemes by collecting potentials and overpricing things back to them. This is what we've done in researching how they're buying PMs, leading us to the realization that fiat cannot hold for much more time. Pay people in cryptocurrencies if they do a service for you. Tip people in crypto. Own a gas station? Allow them to purchase with BTC... shit like that. I can come up with a lot of ideas, really. The only issue I can see arising is me mentioning the wrong idea and getting an awful lot of eyes for it...