It's definitely unethical but the creator of Putty keeps insisting and repeating that the Putty website is the long old homepage style URL and "always has been"

It's definitely unethical but the creator of Putty keeps insisting and repeating that the Putty website is the long old homepage style URL and "always has been" and "if people search they can find it". I think if they actually have a problem with it and are not just repeating that to cope they need to start acting like they have a problem with it. Trademarks need defending and you come out the door with the mental model that it's yours, you own it, the other group are in the wrong. If you opened your trademark dispute with "Well our trademark has always been X and people know to find us at X" you're gonna lose your dispute. It's just hard to argue it's actually a real problem if the individual it's affecting keeps sort of pretending and saying that it's not even if deep down it is.