No such thing as a silent alert... it is either all out or none at all.
It is enough to see it on the TV news, radio, online news, flashing led billboards over the freeways every few miles and in the newspapers. No need to blare it on your phones.
Has any of you who are for having this turned on your phone actually had your phone go off??? I didn't think so! It is LOUD with vibrations, flashing screens!! If it did go off in Church, Business meeting, while driving in heavy traffic on on corners, at a restaurant, 3am in the morning etc... you all would think different... extremely annoying, in some cases dangerous and embarrassing.