The AP posted this story today about Thyroid Cancer patients and how they expose unknowing people to RAI, and can contaminate them and other things. It's a very interesting article.
Luckily, Strong Hospital was very cautious on sending someone with RAI out of the hospital, and making sure I wasn't going to contaminate people. The only thing I never thought of was the garbage setting of alarms and could possibly contaminating people.
Go check it out!