When you create a tutorial, you need to upload an image that displays something relevant to the what the tutorial is teaching, not just your username.
Yes, that is fair enough for most submissions.
However, i don't believe this should be applied to submissions in the scripting categories.
There is no point writing a script, then having a picture of the script in notepad next to it. It is redundant and ugly and wastes space on FPS Banana.
My suggestion is making screen shots for scripting & scripting tutorials optional, and only force screen shots for skins, map etc...