I understand the concern but the device is actually much more stable and secure than you'd imagine.The spike will be inset from the edges a good 1-3/8" or so and the topsheet of the tables is quite soft.When you place even a moderate load,the spikes dig in pretty firmly and you have to push pretty hard to get any movement and would be dragging the spike tip across the veneer.In a typical Mana phased array, the clearances are closer to 1/2" and the spikes rest on a hard and fairly smooth formica.Unless you do a lot of "entertaining", practice for WWF tag team wrestling matches or train Labrador retrievers in your listening room,I say that the stacked IKEA is pretty secure.Certainly moreso than using rollerblocks or tall unsecured footers,etc under your components.
Best,
Ken
Best,
Ken