Well, they stopped that one specific redirect "and others" [1], but this will just be a game of whack-a-mole given the huge number of organizations (local, state, federal) hosting sites under .GOV. I'm sure there are tons more redirects lurking on rarely viewed sites under .GOV. It's not hard to find potential starting points [2][3].

[1] labor.vermont.gov/LinkClick.aspx?link=[spam site]

[2] http://www.google.com/search?q=site:.gov+inurl%3Aredirect

[3] http://www.google.com/search?q=site:.gov+inurl%3Alinkclick