diff --git a/frappe/public/js/frappe/desk.js b/frappe/public/js/frappe/desk.js
index 55c91a7554..8d8a253085 100644
--- a/frappe/public/js/frappe/desk.js
+++ b/frappe/public/js/frappe/desk.js
@@ -269,13 +269,18 @@ frappe.Application = Class.extend({
 	},
 
 	set_globals: function() {
+		console.warn('The global `user` has been deprecated. Please use `frappe.session.user` instead.');
 		frappe.session.user = frappe.boot.user.name;
 		frappe.session.user_email = frappe.boot.user.email;
 		frappe.session.user_fullname = frappe.user_info().fullname;
 
+		console.warn('The global `user_defaults` has been deprecated. Please use `frappe.user_roles` instead.');
 		frappe.user_defaults = frappe.boot.user.defaults;
+		console.warn('The global `roles` has been deprecated. Please use `frappe.user_roles` instead.');
 		frappe.user_roles = frappe.boot.user.roles;
+		console.warn('The global `sys_defaults` has been deprecated. Please use `frappe.sys_defaults` instead.');
 		frappe.sys_defaults = frappe.boot.sysdefaults;
+
 		frappe.ui.py_date_format = frappe.boot.sysdefaults.date_format.replace('dd', '%d').replace('mm', '%m').replace('yyyy', '%Y');
 		frappe.boot.user.last_selected_values = {};
 	},
@@ -296,12 +301,12 @@ frappe.Application = Class.extend({
 		localStorage["page_info"] = JSON.stringify(frappe.boot.page_info);
 	},
 	set_as_guest: function() {
-		// for backward compatibility
 		frappe.session.user = 'Guest';
+		frappe.session.user_email = '';
 		frappe.session.user_fullname = 'Guest';
+
 		frappe.user_defaults = {};
 		frappe.user_roles = ['Guest'];
-		frappe.session.user_email = '';
 		frappe.sys_defaults = {};
 	},
 	make_page_container: function() {
diff --git a/frappe/public/js/frappe/misc/datetime.js b/frappe/public/js/frappe/misc/datetime.js
index 79f72a0ef4..e8cd44862f 100644
--- a/frappe/public/js/frappe/misc/datetime.js
+++ b/frappe/public/js/frappe/misc/datetime.js
@@ -155,6 +155,4 @@ $.extend(frappe.datetime, {
 
 });
 
-// globals (deprecate)
-// var date = dateutil = frappe.datetime;
-// var get_today = frappe.datetime.get_today;
+console.warn('The globals `dateutil` and `get_today` are deprecated. Please use `frappe.datetime` instead.')
diff --git a/frappe/public/js/frappe/ui/messages.js b/frappe/public/js/frappe/ui/messages.js
index f8800eeace..5cd617e5d9 100644
--- a/frappe/public/js/frappe/ui/messages.js
+++ b/frappe/public/js/frappe/ui/messages.js
@@ -77,6 +77,7 @@ frappe.prompt = function(fields, callback, title, primary_label) {
 	return d;
 }
 
+console.warn('The globals `msgprint` and `show_alert` has been deprecated. Please use `frappe.msgprint` and `frappe.show_alert` instead.');
 var msg_dialog=null;
 frappe.msgprint = function(msg, title) {
 	if(!msg) return;
@@ -221,8 +222,6 @@ frappe.verify_password = function(callback) {
 	}, __("Verify Password"), __("Verify"))
 }
 
-var msgprint = frappe.msgprint;
-
 frappe.show_progress = function(title, count, total) {
 	if(frappe.cur_progress && frappe.cur_progress.title === title
 			&& frappe.cur_progress.$wrapper.is(":visible")) {
diff --git a/frappe/public/js/legacy/datatype.js b/frappe/public/js/legacy/datatype.js
index 84c4ebe949..bf7024d6e8 100644
--- a/frappe/public/js/legacy/datatype.js
+++ b/frappe/public/js/legacy/datatype.js
@@ -75,12 +75,7 @@ var crop = function(s, len) {
 		return s;
 }
 
-
-function keys(obj) {
-	var mykeys=[];
-	for (var key in obj) mykeys[mykeys.length]=key;
-	return mykeys;
-}
+console.warn('The global `keys` has been deprecated. Please use `Object.keys` instead');
 
 function has_words(list, item) {
 	if(!item) return true;
diff --git a/frappe/public/js/legacy/form.js b/frappe/public/js/legacy/form.js
index 433a8198c0..5bd3c5b175 100644
--- a/frappe/public/js/legacy/form.js
+++ b/frappe/public/js/legacy/form.js
@@ -690,6 +690,7 @@ _f.Frm.prototype.reload_doc = function() {
 	}
 }
 
+console.warn('The global `validated` has been deprecated. Please use `frappe.validated` instead.');
 frappe.validated = 0;
 _f.Frm.prototype.save = function(save_action, callback, btn, on_error) {
 	btn && $(btn).prop("disabled", true);