Agreed.

I am fully in favour of satire. And the use of what tend to be memes to spread views in an semi-serious way isn't something i'm entirely against just cautious about.

And I do think that outside of the internet (or the media) the tactic loses a lot of its value. If you were on a stall for example having a leaflet that was just a joke would be counter-intuitive. But a sign at a protest could be far more effective if it was "just a joke". So I guess it's context dependent.