Just like Stallman you can express disagreeable things.
If you control money that goes to Fred who employs Bob and tell Fred fire Bob or I fire you then while your actions may be verbal they aren't merely communicative. Clearly you are acting to censor Bob. You may well simultaneously be within your rights to do so and also wrong to do it. If I tell you so I'm not controlling you I'm just trying to persuade you.
If you control money that goes to Fred who employs Bob and tell Fred fire Bob or I fire you then while your actions may be verbal they aren't merely communicative. Clearly you are acting to censor Bob. You may well simultaneously be within your rights to do so and also wrong to do it. If I tell you so I'm not controlling you I'm just trying to persuade you.