A few years ago Starbuck’s - claiming a copyright violation - sued a tiny Greek Orthodox monastery for selling a “Christmas blend” coffee. Yes, Starbucks actually thought “Christmas blend” was something they could have proprietary rights to. They lost, and looked like silly, small-minded men in the process.
Sewers of suing, as it were.
Specialized Bicycles sent a cease and desist letter to a small bike shop in Canada called Cafe Robaix. Seems Specialized makes a Robaix model. Turns out Specialized was using Robaix under a license from another bicycle maker that told Specialized to stuff it and then sent a nice letter to the bike shop telling them to keep their name. Still don’t understand how you trademark the name of a town, or the name of an animal. It is like the patent wars over electronics. They are patenting broad ideas, not code or technology.