'Just not eat prawns' is barely more than social action theatre. That's a point too. "I'm silently protesting something" is no protest at all. In fact, it is damaging the innocent for infinitesimal gain (the supply chain, the grocer, your own food variety).

You want to seize on a cause, go ahead. That would entail work, doing research, sending letters, something! That I could get behind; in fact, as I suggest, many of us are doing something every day. And maybe get a little weary of the warriors who respect gestures over substance.