Many plasmas come with wall anchors that allow you to bolt it to the wall behind it with wires so that the plasma won't accidentally tip forward. This isn't really a major concern, but if you do have kids then you may want to consider what would happen if one of them fell into the stand hard enough...
Not just the beautiful plasma falling - but landing on a child. Both of which are costly - but one of which is irreplacable.
Your decision which.