At the same time spake the Lord by Isaiah the son of Amoz, saying, Go and loose the sackcloth from off thy loins, and put off thy shoe from thy foot. And he did so, walking naked and barefoot. Isaiah 20:2 KJV
Prophets have oftentimes been referred as men gone mad with a message from God. Messengers of God have also had to use some extreme methods to grab the audience’s attention.
Ezekiel laid on his side for an extended period of time. Elisha told a leper to wash in a river to be cleansed. Elijah called down fire from heaven. Jeremiah walked about while bound in stocks like a prisoner to demonstrate the suffering that would come upon the people once in captivity.
These and others used extreme methods to the attention of the people.