Comcast taking action against Comcastroturf.com for trademark infringement 9 years ago
Techdirt also has this story: https://tdrt.io/gej
Re: "have to sue you defend a trademark"
The bully will simply state the oft-repeated excuse that they must bully according to trademark law, which isn't remotely the case.
It's the same excuse we see time and time again and it's almost always false.