gear Node and Edge

[1000i100]

gear or scriptable : Special Nodes and Edges with a textarea to add custom behavior in JS (or other)

It feel more simple to me than functionnal group, but less secure.
I don't know how to make scriptable node or edge really safe :
User can add code in a demo and make it run in other user browser, so it's a XSS / CSRF paradize.
Perhaps browser are secure enouth and this is not a problem, but i'm not sure.

What's your feeling about making scriptable nodes and edges in loopy ?