Over the last few years many of you have worked on modifying and manipulating Uru and Uru related products. By doing so you have raised many issues that Cyan now needs to look into. Whether the issue is fan created content to alcugs or your own personal endeavor these are not items we can decide on quickly.
The assumption made by many in the fan community is if Cyan doesn't say anything then they must be okay with it. Don't mistake our silence for approval. These issues need to be discussed in detail on our end to determine where they fall in the big picture.
We have never given anyone permission to hack our engine, make servers with unauthorized data; use our global data, etc.
. . .
http://www.uruobsession.com/forum/index.php?act=ST&f=35&t=22514 outlines some ground rules, but it also states that
The problem is that by using Uru intellectual property (including Age names, characters, textures, models, etc.) you kind of put us in a position where we have to be the bad guy. If we don't protect our copyrights and trademarks, we may have all kinds of issues down the road - both legally and story-wise.
Clearly fan-Ages can do as much damage to Cyan as anything else. Flymode was certainly damaging to Uru, the AdminKI and whatnot were damaging to Uru, but Cyan never told us to stop. They stayed silent. Don't assume that silence is approval. Cyan may be very slow to act on something, but they have also acted as fast as lightning in the past.