My fav "abuse" of the system was a car park terminal that was running some flavour of Windows with an antivirus software.
It had a scanner for the barcode of a ticket, but, it understood lots of other barcodes/encoding systems and must have been logging to the filesystem.
So... saw someone encode the EICAR test string to a QR Code and put it to the scanner... that caused the AV to popup which covered the entire screen and made the terminal unusable!
It's very promising, but, seriously buggy as of now - DNS keeps randomly dropping/leaking unreliably which was causing us issues and random drops to private resources along with a few other issues.
I think we switched to tailscale (I don't look after that side)... it's still a cool solution and think we will be looking at it again in the future.
Stripe is a nightmare and I found support to be awful and not know their own product.
We are a UK company but now have clients worldwide and worldwide bank accounts (thanks to Wise).
So many people in the US can't pay via ACH Transfer (we can't do debit without a US entity... looking in to options and setting up a LLC now), so, we need to be able to accept credit card.
I thought I had a nice workaround by having USD to my USD account and only paying standard (high) fees, but, they now charge me a surcharge for this despite no Forex fees needed, and worse, the fees always link to the wrong transactions so I can't even reconcile properly.
On top of this, they force convert my CAD to GBP despite having a CAD bank account, and charge me so many fees on top.
It's the only option I've found as of now, but, I'm far far from being a fan.
https://learn.microsoft.com/en-us/typography/font-list/mczee
This was my go-to many years ago!