Unclear on the concept: WWF to hand out "Hotter than I Should Be" T-shirts to people facing wind chills in the low 40s F?

WWF Flash Mob Sign Up Form (Thursday, November 1 at Noon)

Act fast -- the first 30 people who sign up as organizers (agreeing to recruit 2+ of their friends to join them) will get a free “Hotter Than I Should Be” WWF t-shirt!...Strategically placed videographers will capture your moment. We’ll email you when the video goes on the Web! **Why hold umbrellas? Umbrellas are symbolic of the increasingly extreme weather our country is facing (and will face) due to climate change, from heat waves and wildfires to flooding and heavier rainfalls. By participating in this flash mob you’ll help WWF create a fun way (a YouTube video) to show how climate change affects us all.

Washington, District of Columbia (20001) Conditions & Forecast : Weather Underground

[If it's 50F with an 11 mph wind at noon in DC today, the "old wind chill" will be about 39 degrees.  Calculate the wind chill any way you want; I don't think most people will feel "hotter than they should be" if they stand around for very long in a T-shirt in the weather.]