They know because of the licensing system they implemented last season... that thing dials directly into the WDFW database... if your number comes up w/a flag... you don't get your license until you tell them either you got something, didn't get something, or didn't even hunt something... if that makes sense. I just struck me after I had filled out my harvest report that they say this only applies to those who purchased deer tags, elk tags, or turkey tags... then a lightbulb went off in my head and said "Wait a minute, they gave a turkey tag WITH the small game license - so EVERYONE would have to fill this thing out"... I wonder if they implemented last year's system with this kind of thing in mind... don't know if I should be worried about it or not.