Read it and weep: Link
This practice had been curtailed in the wake of the 2001 terror attacks. If I told you the curtailment was done as a cost-cutting measure, well, that would be embarrassing enough (a set of wings can't run more than a penny or two). Actually, it's worse than that. The real reason is almost too pathetic to be believed: Transportation Security Administration banned the distribution of toy wings because of the small metal pin affixed to the backside.