Originally Posted by Liam_H
But that's what I'm getting at. The events made him uneasy of what's out there, adding some defense to his house would be a reaction to that.
True. Though I suppose he never thought he would eer give his home adress on TV, or that his suit was enough protection. We see him going everywhere on an IM suit though, there's a scene at the beginning were he goes to a restaurant with the Mark VII. I think Stark didn't really expect The Mandarin to blow up his house either, the element of surprise was his downfall.