Must I quote the rules so you'll get the point? :<
All icons must be at least 50% freehand created. Non-freehand techniques include mirroring, cloning (or brute cloning, as in clear copy-paste), recoloring, resizing, rotating and tracing.
Original Work
Stealing shall be severely punished with -25 reputation/icon. Stealing up to 2 pieces of art will result in a temporary ban (1 week). If the stealing continues, any offender shall be permanently banned.
Copy and Paste
If you partially copy-paste parts of your icon, mention the source or else it might be considered stealing.