Here's a quick example of how linkset mechanics work in SL:
Those that understand the significance of this will know why this is very bad. This also means that ANY omega-compatible mesh that happens to be mod is vulnerable.
It should be pointed out that there is NO way via LSL to distinguish between a "really" no-trans object and a "temporarily" no-trans object.
To solve this, LL needs to do two things: Add an llGetLinkPermMask(category) function, and add an extra category that stores the unlinked permissions.
EDIT: Without naming names, it does indeed work on mod meshes that are omega enabled. Meaning it's possible for much less than 999L$. I'd like for LL to fix this.