Kevin Robert Dean wrote:
>
>
> Or is the problem that Marx's Labor Theory of Value doesn't
> fit well on a placard?
>
Bingo! Neither does Lenin's _Imperialism_ or Wood's _Democracy against Capitalism_! Even the fine post Chuck Grimes wrote recently (on pig capitalists etc) quite fit. You'd be surprised how hard it is to figure out in a given context what should go on the placards.
Carrol