carlinho wrote:If I recall correctly, creation games also didn't allow for mapmakers to modify or use their content.
And yet I still have permission to use any unit made by Cydonian.
Permissions and credit should be taken very seriously, try pulling half of the credit stealing crap over on a community like the Nexus (Fallout 3, FNV, Skyrim, TES, DA supported etc) and you'll end up on the bad end of a ban.
Try pulling it in the professional industry and instead it'll be a lawsuit (preceded by cease and desist letters). Even if you win the lawsuit trying getting your game complete with a signifcant chunk of your budget lost to fighting it.
When someone puts in hard work and effort to create something, that should be recognized and they should be credited for it. Crediting doesn't make people think you suck, it makes people respect you for your honesty.
If you don't credit, you are a dick. Simple as that.