No, if Kerry knew and didn't report it (which I believe is very likely) it was because it would tar him as well.
The VVAW was Kerry's only claim to fame. He couldn't help expose them for the lunatics that they in fact were.
Remember, he is still milking his VVAW connections. They are still his band of brothers. John Hurley, who runs Veterans For Kerry and is a major Kerry spokesman is a former VVAW member.
Joe Bangert is a major veterans organizer for Kerry, and has been for many of his elections, going back to his run for lt. Governor. Bangert is as big a liar as Hubbard and almost as crazy as Camil:
One Of John Kerry's "Band Of Brothers"
http://www.freerepublic.com/focus/f-news/1092936/posts Kerry's Veteran Organizer Joe Bangert Sang For The Enemy
http://www.freerepublic.com/focus/f-news/1092856/posts Joe Bangert's Testimony Before The Winter Soldiers Investigation [Bangert Is Kerry's Vet Organizer]
http://www.freerepublic.com/focus/f-news/1092905/posts