Using Spoof in SL

There's a lil more too the common sense part, like not hanging out in the store where you just ripped the items from (or any store for that matter, because even the competition is usually not thrilled by the ideas of copybotters). Creators have a keen eye for that sort of thing, after all it's their baby and they constantly look for improvements, which makes the opposite also true (meaning they have keen eye for botched work).

Your re-upload will never be a exact match, the LOD (Level Of Detail) will be different and might visibly collapse into a bunch of triangles from a distance. It won't respond to the creators HUDs, etc. You can however do a great job to mimick these things as close as possible. But it takes just one difference for the original creator to notice, so stay away from stores, creators, their friends and their staff and especially Lindens.