I've not experienced it as a gamer, but I certainly have as a customer.

Many a time I've had to fight my way through the kiddy hoardes just to get anywhere near the shelves, and you always get at least one idiot who adopts the 'you shall not pass' mentality' (a well filled rucksack 'accidentlally' in the head works well).

The oddest situation was when one of the little 'darlings' decided I'd make a good substitute parent, and wanted to borrow money from me (I had no idea who this kid was & he certainly didn't get my cash).

The only good part, is that it really reinforces my resolve never, ever to have kids.