Also, didn't the Weathermen blow a few buildings up or something? Or is that more 'terrorism' than 'crime'?
I'm a bit too young to know and they tend to avoid the 70s in History class for some reason, so most of what I know of the 70s comes from Rock & Roll Music.
Like a lot of terrorist organizations the fringes of the Weathermen committed crimes aside from terrorism. Some
background info on the Weatherman Underground on Wikipedia. Like a great many radical organizations most of the members paid lip service to the cause, but did not run around blowing up buildings. The ones that did helped defeat their own cause, public reaction turning against them. Ironically, many of the charges against members of the Underground ended up being dropped because of illegal methods used by J. Edgar Hoover's FBI. Some things just keep coming 'round it seems.

For the most part the WUO avoided inflicting human casualties, focusing on financial damage. The major exception was an accident in Greenwich Village, where several members of the WUO were killed. One of the later bomb sites was
Haymarket Square in Chicago - site of a previous bombing in 1866. This actually ties in with my current 1888 game, the history of the unions makes for some very grim reading.
I have not yet seen the movie 'The Weatherman Underground', but am tempted by 'Across the Universe'.
The Auld Grump