Fair point but...
As mentioned in the article, it wasn't this that cause the crisis.
"How the bankers "make" the money is by doing it thousands of times a second so it all buids up and this would stop this." WHY do you want to stop this?!?!? OK the whole banking system is a big farce built on imaginary money, but this bit actually "works".
"The banks by doing this are taking the money out of our economy i.e. us and giving us nothing in return." - well no. The bank makes a profit - their staff get paid, their shareholders get a dividend, and the bank has money to invest in new business etc.
For now all *I'd* do (& IANAB) is fix the system so that the last crisis can't happen again (or can easily be mitigated) and then step back and think before doing anything else. Knee-jerk reactions/laws/regulations never really work. & Yeah i know it's how the current (UK) government operates but hey...