Well, you could put a red blinking sign.... 
 Or you could label the stuff differently.  
Since you get a lot of questions about things 
already on your website, maybe you ought to 
change the layout? If it was just a few stray 
people here and there I guess it wouldn't be 
enough to worry about it, but if you get enough 
people asking stuff that it annoys you to the 
point of sarcasm maybe it's not their problem but 
the layout. Of course, this is just a suggestion 
based on your comment-- The page seems pretty 
easy to navigate already, I just didn't recognize 
what the search engine could do.
 
 Ja ne!