The only reason NPC's are not talking on servers you go to (if they are not talking),  is because the owner of the server did not add a quest file which is linked/binded to the NPC to make them talk/respond to you/give you an item in return for quest items they want/ etc etc etc. 
 
 
Look around, there are how many NPCs?  That's a lot of quest files to be made, and a lot of work. 
 
 
Bottom line is yes, it is possible to make NPC's talk. 
		
	
		
		
		
		
		
		
		
		
		
	
		
			
			
			
			
			
			
			
			
			
				
			
			
			
		 
		
	
	
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