I tend to agree with Tacoman here. I don't know that it's feasible to get everyone to a community shelter fast enough if a tornado warning is issued, especially if your neighborhood is experiencing severe weather already. And do you really want hundreds of people swarming one spot in cars, in severe weather? I tend to think it's better for people to stay where they are, and find the best place to ride the storm out at that location.
Plus no matter what you do, you are always going to have people who don't care about the weather aren't going to take any action at all. They will be the ones fuming about Dancing with the Stars being interrupted as an F5 heads right for their house.
And for the record, I think the NWS and SPC and local mets (especially Spann) did an excellent job yesterday from what I saw.