I was just thinking today, if the authorities talked to us about all other dangers the way they do about radiation (medical radiation included, I've had the talk from a medical physicist):

"You're exposed to mercury from the coal-fired power plants in the air you breathe anyway, so go ahead and break those light bulbs."

"You're exposed to E. coli anyway if you have pets, so I'm sure you won't mind if we lace your vegetables with it."

.......