Time for hot dogs, fireworks and the annual New England Muzzle Awards, hosted once again by WGBH News. Believe it or not, this is the 20th time that Harvey Silverglate and I have rounded up outrages against free speech and free expression. There are some good ones here, from Google and Facebook to the Mystic Valley Regional Charter School in Malden. Please have a look. It would be un-American not to.