There should, really be a resource time clause.... i mean if theres no way to reach them..., and maybe on the rules, give some radio button options:
( ) Allow Full EDITING, with Credit NOT required
( ) Allow Full Editing, with origional Author crediting required
( ) Allow NO editing, Without Explicit Concent from author, Credit Required
( ) Allow Basic EDITING, (weapon/part removal, and scaleing) with credit reqiored
( ) Ect....
This would give the authors the option, to let their work be open if they chose, i know i personally dont care, if someone edits my work, afterall alot of Pieces need "adjusting" to fit well into a map, it greatly increases the posibility for the models already out there, Geo-Mergers, dont credit blizz for the parts they use do they? although this is a more obvious form, seing as almost everyone here has
wc3, and knows what parts came from where (usually)