The same is true of investors. A legal battle with a company you invested in might close off access to future deals.
Now, a reasonable person might evaluate the facts of the case if they have time...but not everyone has the time and/or would agree that they should sue Uber.
It is alot like having worked on a porn site I think. Some people would go "Oh, cool, you worked on a big project there that had the kind of scale we hope to achieve."
Others would look at it and drop your resume directly into the trashbin.
I suspect there is a similar effect on VC/Angel access to startups that are popular enough to have a bidding war like Uber.