My kids couldn't care less about anything they don't know about...so if I don't mention it, they don't ask. If I don't make it a big deal, they don't know it is a big deal. And, no...my kids are not babies. They are 13, 9, and 7. Plenty old enough to be aware of what's going on around them.
As someone who has studied sociology, psychology, and has done extensive research on the root causes of bullying, I have found that the majority of a child's behavior/attitudes/perspectives comes straight from the example of the parents, at least (and even after) up until the age of adolescence. Bottom line is... if you want your kids to think pin-trading is a big deal, they will. If you don't, then they won't.
Unless they are teens. Once they are teens, all bets are off. They don't want to listen to parents, and will do everything opposite of their parents anyway - so my recommendation is that you encourage the exact opposite behavior you are trying to discourage LOL