Just as an aside, I'm currently recruiting for somebody to work on wing aerodynamics - for various reasons I really need a Brit and have said so in the advertisement. I've been advertising in the usual websites, etc.
Although one or two of the applicants are actually qualified for the job and I'll be interviewing them (phew!), I've also clocked up two computer programmers from London, and an environmental engineer from Chile.
There must be a polite form of words to say "since you are too stupid to understand my job advertisement, you are clearly too stupid to be allowed to work here". Sadly I can't actually say that to the applicants - tempting however!
I do incidentally insist on being the contact for my own advertisements - I'd rather put up with that particularly silliness than have our HR department deciding for me whether I should interview somebody or not. (Although even they probably could have managed to filter out the Chilean fellow!).
G