1. PJ didn't get sued because of BIBP.
They got sued because of a hardly ever seen TV commercial in which someone claimed Better Ingredients Better Pizza THAN Pizza Hut!
That's why they got sued, because in that commercial someone claimed it was better than Pizza Hut.
2. It's not the first time they got sued either, nor is BIBP their first slogan.
They had to take their first slogan down, the BIBP slogan is the result of the first lawsuit.
I'm guessing you didn't do all your homework but you call yourself whatever you want, so long you don't mind spending it in court.
As for myself, I'll stick to the simpler and far more humble names / slogans, but thank you for asking.