As someone who has used dating sites with a mixed bag of success, I have to agree with you, somewhat. I have seen some of the same guys on there for almost the entire 7 years I have been divorced. I think these are the ones who sit at their computer perusing the site and wait for their one true love to click on them and say here I am. But the thing is she will never show up! You tend to become jaded after being on for awhile, and you continually shoot down prospective matches because you are looking for the perfect one. They rarely even give someone a chance and stop communication before it ever goes anywhere. I don't know if they are scared to death or just lazy. It's easy to say you want a relationship but it's a lot harder to go out and make it happen.
You're right about lying too. People who answer no way! to smoking, but there are recent pictures with cigarette in hand, or social drinker who no longer likes the bar scene but has numerous pictures with drinks in hand inside of bars. Go figure.
Then on the other hand, I have met some really nice guys who portrayed themselves accurately but for one reason or another didn't work out, and had one successful year long relationship.
I got tired of trying to read between the lines and figure out which ones were authentic and which were just blowing smoke, so I now rely on friends, family, or customers who I have come to trust to set me up.