Are touch lamps safe?
Your understanding of the way these lamps work is not quite correct. The lamps are basically capacitive touch sensors. Similar to a low, very low, resolution touch screen for a smart phone. 

The idea is you're a capacitor. The lamp's surface is also a capacitor. The lamp knows how long it takes to charge itself. If you touch the lamp, you add to its capacitance and it takes longer to charge, the lamp detects this time difference and turns on. 

It's perfectly safe. It's safe because the current is incredibly low. Voltage stings, current kills.

Don't you love lamp? I love lamp.