Shell is prompting just fine on its own, no need for variable. Make sure leet folder exists.

local.yml

@@ -7,12 +7,6 @@
   connection: local
   become: true  
 
-  vars_prompt:
-    - name: leet_passwd
-      prompt: 'Enter password for 1337 share: '
-      unsafe: yes
-      private: yes
-
   pre_tasks:
     - include: facts/system.yml
     - include: facts/package.yml

tasks/general/acct_mgmt/keys.yml

@@ -14,5 +14,3 @@
 
 - name: SSH Key | Root | Copy to 1337
   shell: ssh-copy-id -f -i /root/.ssh/id_rsa ling@leet
-  args:
-    stdin: "{{ leet_passwd }}"

tasks/general/acct_mgmt/mounts.yml

@@ -1,7 +1,10 @@
 ---
 # Mount shares that all systems should have.
 
-- name: Add 1337 to fstab
+- name: Mounts | Create 1337 Folder
+  shell: mkdir -p /mnt/leet
+
+- name: Mounts | Create 1337 fstab Entry
   blockinfile:
     path: /etc/fstab
     block: |