Just a small remark: If you're visiting the USA your fingerprints get taken every time (at least thats my experience). So that part of the story (an american complaining that their fingerprints got taken in the UK) is kind of skewed perspective.
Your fingerprints (all 10), iris scan, and photograph will be taken each time you apply for a UK Visa. Same goes for USA, so it did not come as a surprise, too. (I have an Indian Passport)
What my worry is, though, that all of the application processes are outsourced to VFS Global[0] for both USA and UK, and I can't help but be skeptic about it.
However, the majority of foreigners entering both the UK and US do so without a visa, as far as I'm aware. In the UK case, typically no fingerprints are taken, whereas in the US they are.
Providing biometrics at the Border is still at some level okay, of course, assuming that their data security can be trusted.
At VFS Global, however, I see the "visa interviewer"[0] struggling to handle the computers, and can't help but be worried about how they'll be transmitting and storing that data. My personal experience with Indian firms handling data hasn't been good and I certainly do not trust them[1].
[0] They're also Indians, and employed by the firm.
[1] I have only this anecdote -- I am not sure about how it is done elsewhere.
I've lived in the US for 6 years, first as a TN then as an H-1B, and I have Global Entry (and NEXUS). My favorite welcome back to the US is a a little note at the bottom of the receipt the Global Entry kiosk prints every time I show up:
"Warning.... an alien that accepts unauthorized employment is subject to deportation"
That's pretty standard. Think about every communication you've ever gotten from the government. There's always a warning somewhere on it. "Penalty for private use: $300" -- like I'm going to re-use an IRS envelope.
Both the UK and the USA border authorities share their biometric databases like gossip girls. Even when there's (5, 10 year) limit on the records, the safe bet it's been shared with rest of the globe and make endless circles via law enforcement cooperation.
I figure my fingerprints will be in the system decades after I die.
Photo and 10 prints every time I enter the US, and probably stored for eternity.
My favourite is a receipt I have for "Alien Flight Student", which required even more screening and fingerprinting. I'm still waiting for them to bring out the flying saucers...
Canadian citizens are exempt if they're coming across as a visitor. Pretty much everyone else -- visa waiver program visitors, holders of non-immigrant visas, permanent residents -- get fingerprinted at the border these days.
The program used to be called US-VISIT, and has now been expanded into something called OBIM. There's much more information online under the former name.
I'm german, so it probably depends on the nationality of the visitor or maybe even the destination airport (I landed in Atlanta). But there was no discussion or anything, just "put your finger on this scanner, thanks, next finger ...". Everything was alright with my visa and every other passenger in line had to do the same thing.
I'm a French citizen living in Canada and going fairly often to the US by bus. They do it at land borders too, it's just that Canadian citizens are exempt.
Canadians get the same treatment that US citizens get and they don't do the fingerprint thing then.
All others, including ESTA or visa holders have to go through this every, single time. Souce: I was in the US 10+ times in the last 3 years and don't have a US nor Canadian passport.
Me too, 2010 or 2011 I think. I think that was on the same terminal where they later started hassling me for lefse or akevitt until I missed my connection (came from Scandinavia.)
To be fair: my best modern airport experience was US as well. Denver was just awesome, really surprisingly quick and amazingly effective (that's where I lost my key-tool with a 12mm blade I thought was legal and that went with me through several airports prior to Denver.)
As an American it is not her fault that your finger prints are taken at the US border so your argument that it is a "skewed perspective" and implication that she doesn't have a right to complain about it does not hold water.