You are going to run into bad people everywhere you go. It doesn't matter what dating sight you go on. These people are looking for easy targets and peole looking for love can be just the type that can fall for a smooth talker with a pretty/handsome photo.
There are also guys out there who seem to start out legit but really only want to lure you into phone or web sex. I suspect many of these guys are married and have fake profiles up.
But then there are the people who are honest, real and are looking for love.
Just be smart, wade thru the BS, (know it when you see it) report/block the bad ones and keep looking. There is really no need to quit the sight because a a few bad apples.
Like I said in a prior post, I am currently in a relationship with the man I met on Chemistry (2+ years). I am also still in friendly convos with a few guys that turned out to be just friends and we keep in touch.
Don't give out your real emails/phone # until you are comfortable and have had a date or two.
If possible, Web cam before the 1st date. ( I call it the elimination round)
I also kept convos going with several guys, so as not to get attached with one. I kept my distance until I met Mr. right, then I eventually let my guard down.
ALWAYS plan the first few dates in a VERY public area. Lunch in a little resaurant, coffee at Starbucks, meet in a bookstore, walk your dogs at a busy dog park. Something that you can leave easily if it is not the best date.