There is no point in going out of one's way to avoid offending the witlesses. In reality, once people have to worry about offending anyone, freedom of speech is about to go totally out the window. I prefer treating people as individuals, instead of having to show reverence for their groups they may happen to belong to. As for the religion itself, they go out of their way to treat people like crap, so the leaders deserve to be called cockroaches and witlesses (as does anyone that is in it for the power and control, or as a blind for molesting children).
To answer the question about the witlesses offending us, I have heard from the platform apostates being called agents of the Devil. This is not meant to flatter--it is meant as the strongest insult possible. We are accused of slander, twisting the Bible around, and misleading people away from life. Worldly people are called swine, dogs, and other unsavory names. I heard, right from the platform during a public talk, worldly people being compared to urine. Another talk compared worldly people to poison--mixing a little water with poison doesn't make it clean, but a little poison contaminates the water. This is certainly done in an attempt to insult worldly people, and to make the witlesses afraid of them.
I have heard bad names for worldly religions and institutions, too. I have heard "There sure are going to be a lot of dead Catholics at Armageddon", as well as calling them "cat licks". The Filthful and Disgraceful Slavebugger also has the nerve to call other religions whores and harlots, right in the Revelation book. Regular work is "Egypt". Again, this is in disrespectful reference to Pharaoh and his treatment of the Israelites. They are also disrespectful of worldly holidays and birthdays, the TV (I heard "time vacuum" mentioned numerous time from the platform), and just about everything else associated with the world.
Therefore, since the witlesses are intentionally disrespectful of the world, I see no reason not to use terminology that might offend them. Besides, it is not the terminology that offends them the most. It is the doctrine, and if we were to avoid offending them, we would have to all abandon this forum forever, go back to the Kingdumb Hell, waste our time in field circus, and only do whatever the Filthful and Disgraceful Slavebugger tells us. Otherwise, we are going to offend the witlesses. Oh yes, and donate all your money to the Worldwide Pedophile Defense Fund--any money you don't use for that purpose offends them, too.