I didn't say you were stupid, its a common mistake made by beginners...and since this is a beginners forum, the assumption made is that your a beginner when it comes to hydraulic brakes.
Now, why did you remove the bleed screw? There is no reason you would have needed to do this. The master cylinder can more than compensate for the fluid being pushed back into it. Did you completely remove the screw? Because its a bleed screw, you only need to loosen it to bleed. Besides, bleeding off fluid should be done at the lever, not the caliper (caliper is where you push fluid into the system). Hopefully you haven't introduced air into the system, but its possible. I've worked on and owned Hayes brakes for 6 years I've never needed to open the bleed screw to push the pads back. If the screw is tight and it still is leaking...my suggestion is to head to your LBS and have a qualified mechanic work on your brakes
PS-hopefully you have cleaned up all the brake fluid from your bike with Isopropyl alcohol AND you made sure you didn't get any on your pads...otherwise your paint will be removed from your frame and your pads will be contaminated and need replacing.