i know what you mean.
at my old number i kept getting calls from people who spoke Spanish all the time. it must be because of my name, but im not mexican or latino of any sort. close, but no cigar. they kept trying to sell me phone cards and crap.
i was talking to a friend of mine and he suggested answering the phone as "Hello, INS." :rofl
PS: no offence to any one of mexican, latino, or spanish decent.