1) - Keep your bank account, I don't suppose they pay VISA anything just for the fact you have a bank account
2) - Where possible, don't use your debit card to buy anything. When you have to use it, don't worry.
3) - As 2 - buy things with your credit card (Mastercard). I hardly ever use my...
As I've been saying for months, that's what we, the fans can do. I started boycotting all sponsors sometime ago.
But the countries themselves have a lot more clout. If they left (UK, US, Germany), the sponsors would go too.
No.
If the European nations were together on this, then just leave FIFA and start a new governing body, and invite the whole world to join. Just boycotting an event (or two) only sends a message, but why send a message when we can start afresh instead?