One time I went on a date with someone who claimed on his online profile that he was 5'11", but upon meeting, it was pretty clear he was a good two inches shy of that. Eh, it wasn't the end of the world, and it didn't make or break the date, but it was a good example of the embellishments people sometimes make on their online dating profiles.
A 22-year-old Indian man got an even bigger shock when he met up with his virtual girlfriend of three years. Upon discovering that his 21-year-old girlfriend was actually a middle-aged mom of three, he allegedly shot and killed her for the lie, then attempted to commit suicide. He later died in the hospital.