More often than not I accidentally execute a link in IE when all I wanted to do was to move the screen. Is it possible to make a double tap a requirement to open a link?
It is not possible to change single tap to double tap.
The problem that you are facing is very rare, probably you need to improve how you scroll and how you touch the screen.
When you want to touch: Gently put your finger on the screen for less than a second and then remove it.
When you want to scroll: Gently put your finger at any point on screen and than slide it down or up and than remove it from the screen.
The problem might also be with sensitivity of touch screen, if you think it is not sensitive enough, you can change sensitivity from settings > touch > touch sensitivity. You can set it to high.