Body language and looks can have an influence on people's minds. If someone sends a picture to someone else then it can influence their mind. Should the picture be considered contraband and the sender punished if the receiver does something irrational?
If the answer is no then why are words different from photos? If we follow the logic consistently then a picture, body language, even micro expressions like emojis are speech which can influence minds. Memes are in any form which can contain information, so to police memes is going to be very difficult and to police memes only in text form is unfair.
No I totally agree with your statements , I was just giving an example where I saw it happen , but you're right , "our thoughts" could be next . They can't police everything
But they will try to police everything and that is the problem. There is no limit to what the general public wants to police. The more the general public knows about itself the more behaviors it will justify policing. The only limit to what can be policed are that which can be justified and that which is technically enabled.