Re: Why the uproar ?
I'll reply in his/her stead.
I work for a bank based in a different European country, and each of our customers opening an account has to sign a form declaring that they aren't a citizen or prior resident of the US, and that form has to be archived and kept available for inspection.
Look up FATCA ( https://en.wikipedia.org/wiki/Foreign_Account_Tax_Compliance_Act#International_implementation ). Now imagine if each country demanded similar paperwork...