Considering how Niche sim racing market is for anything above the realism of Forza or Gran Turismo series, I would rather try to protect it, than exploit it. Each game that is being considered in the category of racing/driving simulator by you folks, is being made by a small development group. ISI, Reiza, Kunos, Sector3... all these devs sales put together do not reach the market share of one single popular games weekly sales, that's how tiny a market we are talking about.
Why would you want to potentially damage the core that your own hobby stands on?
Take Indianapolis and ISI for example: How many hours went into making that track, how many dollars does that come down to, how many people end up using that track?
Now an average pc user with some knowledge of 3DS max can take that work, convert it into any game from the previously mentioned developers, and share the end result, and all those dollars and hours spent for free.
End user will get a kick out of it, "free stuff" right? How does that affect the developer? Are they encouraged to make more expensive, more time consuming, more in depth projects, or just end up out sourcing the work to these hobbyists and pay for the licence if the result is "ok" enough.
It would be very nice to hear how that actually affects the product that has been stolen from, but I doubt there is actual data about this matter for racing sims. Who would study such a thing concerning this minor virtual entity of sim racing.
As a fan of their labor, I personally try to keep myself in 'scratch made content' only, and if there is a track in rF2 that doesn't exist in Assetto Corsa, then I drive it in rF2.
Either you are for or against theft of intellectual property. Simple as that.
Again Personally, I cannot tolerate any distribution of stolen content that might ruin even a moment of my favorite hobby devs day. The thought of this fragile field of independent devs having to go back to using unlicenced "fantasy" content because people do not know how to appreciate what they have, just pisses me off. Hence, you distribute or advertise such endeavours, you get called a git.
http://www.wipo.int/wipo_magazine/en/2014/02/article_0002.html
http://www.gamasutra.com/view/feature/3546/hey_thats_my_game_intellectual_.php?print=1