Is this not one of the funniest drug war news stories you've read. http://gothamist.com/2011/03/31/to_avoid_contact_high_pot_busting_a.php
They aren't getting "high" persay...but actually from a lot of cannabis, the terpenes are very easily given off and inhaled just from smell, which can induce feelings of relaxation. It contributes to the high of the cannabis we experience, and is responsible for the contact high bud tenders and I guess DEA agents get while being around large quantities of cannabis. It's actually not complete BS, it just isn't THC that's getting them high.
So it was way smellier than normal they just decided to look cool and put pointless outfits on to confuse the gullible and please those who oppose it and pay the DEA's salary