Ethics aside, I believe you could indeed do that. It will work for most of the sites out there, but the IP address might be a problem for you at a few, like you suggested. If you use your wife's name though (and don't create another account for yourself), I'm guessing you'll be ok. Worst case is you would get a phone call and need to explain to them that it really is a different person using the account. If you're willing to do that, there's no need to use a different physical address - since presumably you and your wife live under the same roof. 
  
I can't give you exact info here... just speculation.  I imagine it varies from site to site.  I know some of them take having multiple accounts quite seriously though.
		 
		
		
		
		
		
		
			
		
		
		
		
		
			
			
			
			
			
			
			
			
			
			
				
			
			
			
		 
	
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