BB are at fault, they should have given the full details when they made the announcement. That would avoid speculation.
They give warnings before the show, so if people are easily offended they only have themselves to blame if they are offended. the housemates they favour are all capable of offending someone with their swearing, crude talk, spitting in food which BB then allows someone to eat, a grown man throwing the sort of tantrum he probably did as a kid, and smashing equipment, so whatever Biggins did is just one more potential bit of offense. The producers seem to find their favourites less offensive than the others, who look like they are only there to make up the numbers. Hypocrisy.