That's what I figured which is bad to think right? Not so much that it isn't true, because there are predators out there and I need to protect myself, but is there really no alternative method to shutting people down? I hate to even call it that. I'm not ready to date yet so anyone who finds interest in me freaks me out so if it's someone I don't know I'll lie, if it's someone I do know I'll play it off and pretend like I don't know what's happening until they pretend as well.
You should work on being direct and saying you're not interested, men will interpret any nervousness as a gateway, "maybe she's playing hard to get" and be more persistent about extracting whatever they can from you, a simple, "sorry, I'm not interested" may seem rude to you, but if you don't make it VERY CLEAR that you aren't interested up front, a dude will convince himself that he still has a chance.
Stop the problem before it starts.