I have two all time favorites:

1 - When a guy is deer hunting, advertising for some company that sells scent elimination products, and you KNOW the deer smells him because of the way the deer reacts, but heaven forbid the guy say he got smelled and undermine his sponsor. Instead, he says something like" That buck just SENSED something wasn't right"
or "That buck got scared, must be a bigger buck around" or my all time favorite excuse, on a sunny day hunt I actually saw the guys say "he must have seen our shadow on the ground"!!! BULL!!

2 - I don't know if you guys will remember, but 10-15 years ago I saw an ad for HEN URINE, to be used to fool "Ole big Tom" into range. It was a magazine ad that showed two guys with two big toms supposedly shot "while using the hen urine" - CRAP!!

I know I said 2, but I just remembered one more.

Lately, on the Outdoor Channel, I've seen a commercial for some type of mineral, supplement or something to grow big bucks, then it shows two guys with two bucks . One buck is a 1-1/2 yr old 6 or 8 point , under it is the word "BEFORE" in big letters, the buck next to it is a very mature trophy buck with the word "AFTER" printed below it. It's obvious one buck is a baby and the other is mature, and you have to also realize that both bucks were killed at the same time, not "before" and "after". But they expect us to be stupid enough to believe the difference is due to their product. BULL LONEY!!!!!!!!