The “man after God’s own heart” started it all:
David therefore departed thence, and escaped to the cave Adullam: and when his brethren and all his father’s house heard it, they went down thither to him. And every one that was in distress, and every one that was in debt, and every one that was discontented, gathered themselves unto him; and he became a captain over them: and there were with him about four hundred men. (1 Samuel 22:1, 2)
If he did the same thing today, he’d have lots of women, too.