chris is the best to answer this I feel - but outside of checking their IP or connection - you really can't outside of logging all their comments then determining from that search whether its a bot or not.  
 
if a pattern is found such as you say, then a temporary ban may be in order to see if they voice their displeasure.  then again, you can simply ban anything that has a reference to LC and you'll be fine LOL 
		
	
		
		
		
		
			
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"Wise men talk because they have something to say; 
 fools, because they have to say something." - Plato 
			 
		
		
		
		
	
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