"http://" content in "add link" text box can be confusing

Some users ignored this prefix text and typed in their own. This either caused validation errors or corrupted links.

Why it matters

It's generally best practice to avoid partially populating input controls. In this case,it isn't a necessary helper for any user, blind or sighted.

Possible solution

Code to detect a missing "http://" and prepend it to links is trivial.