Yeah, I only ignore that myself if I could be Smashed out in one hit at that point or, in the case of items, something like a Smash Ball is floating overhead (like a later match). If I'm at something like 30%, I play it cool, but if you attack me, I think the movement to me cancels me not moving, so I bite. {XD}
One of my replays (go looking for it under Friends!) is with my Amiibo on that Warioware stage. It was a very stylish finish. I laughed when I noticed how it ended.