This hilarious and harmless scam is making the rounds.
Glavao Bueno is apparently Brazil's biggest sportscaster and apparently a lot of Brazilians find him annoying because they can be seen in the stands with banners "Cala a Boca, Galvao" or "Shut Up, Galvao".
Now there's a viral video on YouTube urging folks to tweet "cala boca" to save the endangered galvao birds -- $0.10 being donated to the Galvao Foundation for each tweet.
Btw, I think Galvao bears a middling resemblance to the late Howard Cosell. If his on-air is in any way similar then it's easy to understand the "Cal Boca" banners :D