Added note about using node permissioning only (PegaSysEng#1243)

docs/Permissions/Permissioning-Overview.md

@@ -7,6 +7,11 @@ A permissioned network is a network where only specified nodes and accounts (par
 Nodes and accounts outside those specified are prevented from participating. Permissioned networks can have node permissioning enabled, 
 account permissioning enabled, or both. 
 
+!!! note
+    In peer-to-peer networks, node-level permissions can be used to enforce rules on nodes you control. 
+    With node-level permissions only, it is still possible a bad actor could violate network governance 
+    and act as a proxy to other nodes.  
+
 ![Node Permissioning](../images/node-permissioning-bad-actor.png)
 
 ![Account Permissioning](../images/account-permissioning.png)