My sister did online, but on a paid website. That helped separate the wheat from the chaff so to speak!
She's been with him 5/6 years now and he's the nicest, most laid back guy you could ever meet, a perfect foil for my sister, who can be a tad highly strung.
When she moved house, I looked after her dog for a couple of months. It was a 3 legged Staffy (sis used to work for the Blue Cross in London, took the dog on as a pup after it had to have a leg amputated, owned by a couple of druggies) and when I used to walk it the amount of female attention I got was unbelievable! Didn't lead (no pun intended) to anything though, unfortunately. Good ice-breaker though, re-telling the dog's story.