There's a difference between "fault" and "blame" that's not easily expressed in the english language, but I'm going to go ahead and call bullshit on your analogy. If someone is going to do something of questionable legality and warns you about it beforehand, does that make it "more legal"? I'll bet you think that people in high-crime areas should "just move out if they don't want to get mugged", too. But here, I have an analogy too:
I decide, say in January, that I want to change my company name from "Foobaz" to "Baz". Over the next 6 months, I go out to a bunch of startups named "Caz", "Faz", and "Jaz", and say "Hey so you might want to change your name because I'm going to change my company's name to Baz and I'm totally going to drop a legal hammer on you if you don't because I can afford it and you can't". After those 6 months are up, I change my name, and then flip around and start suing because they "didn't take my warning".
I decide, say in January, that I want to change my company name from "Foobaz" to "Baz". Over the next 6 months, I go out to a bunch of startups named "Caz", "Faz", and "Jaz", and say "Hey so you might want to change your name because I'm going to change my company's name to Baz and I'm totally going to drop a legal hammer on you if you don't because I can afford it and you can't". After those 6 months are up, I change my name, and then flip around and start suing because they "didn't take my warning".
The logic here is questionable at best.