Ok, first of all, that's not a criminal statute, that's a wikipedia page. Second of all, nowhere on that page does it say that browsing in a store without buying anything is actually theft of services. What I'm saying is that I believe you've made up a definition of a "service" that isn't necessarily the legal definition, and applied it to this situation. You don't like the practice, I get it. That doesn't make it illegal.
OK, here you go...
"Use or any benefit"... "without paying full retail value of such merchandise". I know, picky cherry picky, impossible to prove with shopper taking the 5th, probably never been prosecuted to this degree, but that is the law.
Speaking of internet sales and general ethics. Not too long ago I saw a GREAT deal on an eBay skateboard item. It was buy it now so I immediately closed on it. A few hours I got a message from the seller asking me if I would agree to cancel the transaction, They said that they fat fingered the post from their iPhone when listing the item. Buy it now at $50.00 should have been buy it now at $500.00. In spite of the fact that I really liked the item. I agreed to cancel the transaction because I couldn't enjoy it knowing I was taking advantage of someone in the process of obtaining it.. even if I had every right to and even though that person did something pretty neglectful. That's just how I am. And, I don't mind giving a little holier than thou guilt trip to people that do things I consider blatantly on the shady and dishonest side.