The point is most people will settle out of court because they cant afford the lawers to defend themselves, so you never find out how invalid their claims are.
Its like a robber sticking a gun in your face asking for your wallet. How many people would say screw you I think the gun is fake and how many would shit themselves and hand over the wallet? Of course the theif wouldnt try that with somebody who had a real gun and was ready to lose it.
A long time ago the olympic comittee (the guys who decide where the olympics are held every 4 years) sued everyone using the olympic name to quit using it (there were tons of companies using it to sell stuff even shoes). Of course they never bothered to try sueing Olympic airlines because they had alot of cash and lawers to defend themselves.