Email confirmation is a standard practice for almost any service you register for. How is it a huge pain? If a user is too stupid to get their email and click a link they do not need to post anyway. 
 
IP authentication is going to have its own problems as a lot of people have constantly changing public IP addresses from their ISP. 
		
	
		
		
		
		
		
		
		
		
		
	
		
		
	
	
	 |