I don't think anybody is happy to reveal their legal name to punters - I certainly wouldn't and I don't take any payment other than cash. Equally, I don't have any problem paying work related expenses with my debit card, because I have no reason to think I have any concerns about doing so and it makes my life easier when doing admin.
Since I can't get my head around the paranoia, I'm out. And 'everyone here' has not opened a business account, as I said in my post above.