Mobilizing people for a good cause it’s hard enough when they are next to you. Imagine trying to mobilize them on the social media. Everybody is a hero behind the comfort and safety of their own computer keyboard. Not so in the real life.
Try telling people that their own future it’s at stake and that you need their help. They would simply laugh, make fun of you, or simply ignore you.
Try telling them that it’s the last chance they’ve got. They would call you crazy.