Touch lamps are convenient, but there are safety concerns, they create tons of electrical interference and they are prone to false triggers.
1. safety - its rare, but the module can overheat. I haven't heard of any fires resulting, but burning smells have been reported. In addition, if a power surge damages the safety X/Y capacitors in the circuit, an electric shock is possible.
2. interference - to radio, TV etc. I've seen what a touch lamp can do to the picture on a 46 inch plasma TV and folks, it ain't pretty!
3. false triggers - you come home after a hard day's work and find the light on - but you were sure you turned it off. Or worse - you are awakened in the night by the bedside lamp coming on.
The solution? Get a good powerbar or power strip - one that has surge protection at least 600 joules, more is better [to protect those safety capacitors!] and EMI RFI filtering [at least 50 db, 70 is better] to keep the oscillator generated interference off the powerline and to keep RF signals from getting in to the lamp through the powerline and causing false triggers. Good names to look for: APC, Belkin, Tripp Lite [the high end ones are very good], Monster [good but pricey]. Metal cased units are better than plastic as a general rule but are hard to come by. The main thing is look for surge protection expressed in joules and EMI/RFI expressed in db.
Oh, and that plasma or LCD TV? Get a really good powerbar for it too - same rules - lots of joules and lots of EMI/RFI filtration too.