A Somerset spokesman for the Vegan Society says shock tactics to shame people into giving up meat risk harming the cause.
John Anwen, who lives near Yeovil, says intimidation of meat eaters is not going to gain vegans new friends or change eating habits.
He condemned techniques adopted by some campaigners who have branded meat eaters as rapists and slave masters.
He advocates peaceful lobbying and education to encourage more people to give up meat.