I have known guys that have had success with shills on my space. I didn't, but that may be because they had more time to put into it than I did. I was in a my space private group for this. I was invited by the guy who started it when he saw a few of my posts on mystery's old forum.
Another trick they used was to have your shill send the girl you are interested in an email asking for advice about how to get you. LOL I tried it with okay results. Sometimes the girl I wanted would send me a message asking what I was up to saying we should hang out sometime soon.
It would go something like this:
Shill: How well do you know Scoundrel?
Hottie: Pretty well. Why?
Shill: Because I think he's AWESOME and want to do nasty things with him. But he says he just wants to be my friend. Can you help me?
Then I'd get an email from the hottie saying she wanted to hang out. LOL
I had a shill on POF for a while too. I was able to write my own comments at the bottom of my profile using her and I'd write something cocky and funny on her's as well. I'd write "This chick is soooo lame. She came over to my house at 3AM demanding I satisfy her, but yelled so loud it woke up my neighbors. Then she ate all the food in my fridge, peed on my rug and sang Madonna songs the rest of the night."
You should have read the shit guys sent her after that! ROFL.
I'd have her post the same story on my profile from her point of view. "This guy is such a fag. He wouldn't pay for my cab, he doesn't keep any food in the house and he hates music too! Oh and his rug smells like pee."
When you write something like that people WILL check out the profile of the one that wrote it. So, they'll get both sides and usually get the joke.
I have a shill on FB now and I have her comment on my links and such from time to time. Just a little something for the real girls to see. All she says is "That's so cool" and "Awesome."