Parents/chameleon owners know from experience first-hand and that's why we give our opinions. Do you have a child?
I think common sense applies here. At the end of the day, a parent makes decisions that may or may not have consequences. I don't think anyone here said there is no risk - otherwise, no one would have said WASH YOUR HANDS. Just use caution, the same way you would about washing your hands after using chemicals when cleaning and lock the enclosure and/or house the cham in a room with a baby gate at the entrance. If that doesn't bode well with the person who is concerned about having a cham with a baby, then perhaps you shouldn't have one in your house.