BATFE GFSZ stings -- not a rumor.
BATFE agents befriended mentally disabled people to stimulate business and later arrested them in at least four cities in addition to Milwaukee. In Wichita, BATFE agents referred to a man with a low IQ as "slow-headed" before deciding to secretly use him as a key figure in their sting. Agents in Albuquerque gave a brain-damaged drug addict with little knowledge of weapons a "tutorial" on machine guns, hoping he could find them one.
Agents in several cities opened undercover gun- and drug-buying operations in safe zones near churches and schools, allowed juveniles to come in and play video games and teens to smoke marijuana, and provided alcohol to underage youths. In Portland, Ore., attorneys for three teens who were charged said a female agent dressed provocatively, flirted with the boys and encouraged them to bring drugs and weapons to the store to sell.
Google "BATFE sting operations"