I personally think that the reason why people are asking for mods is that they want to drive their favorite car around a track, to try what it's like. Racing online with their car might not be the priority. In order to put some order into this, there should be a server-side option wether to allow mods or original content only, so that you don't see noobs winning races in batmobiles. I would like to drive a batmobile around Blackwood, but I'm sure that it would be annoying for others, so I'd drive it offline only. What I'm trying to say is that there should be a server-side option to allow (or not) mods.
Quality of the models is another thing that bothers many people here. A rating system based on comunity members' votes would be helpful, although a board of uber-members would be even more. But that's work for no money. Speaking of money, the DEVs could think about releasing a LFS S2m version, that would (for a small fee, if necessary) allow using mods, so that the effort comes with a reward. And as we all know, when something is about money, the competition grows and so does the quality.
Concerning the rules, there obviously have to be some, to prevent chaos. The size and complexity of the model would be predefined by certain boundaries (uncluding wireframe, textures, sounds for cars etc.).
The last thing I want to say that all this talking and flaming about mods is in my point of view absolutely useless until we stop talking BS and show the DEVs that the LFS COMMUNITY IS READY to accept mods in a mature and intelligent way. I don't want to sound like a leader of a revolution, neither I want to be one, but I suggest that we choose the most responsible members of this fine community. They must be respected by us and also by their superiors - The DEVs. After being chosen, they will create rules originating from the DEVs' specifications. They will act as the judge, the jury and the executionner ( :smash3d: ). Models will be rated by the community and the best ones will be forwarded to the board, judged and possibly implemented.
Phew, I think I am overcomplicating things, so I better shut up and see what happens..... *ducks and covers his ears*