[sirinsidiator]

Just tried to unregister every event related to notifications:

ZO_PreHook(CHAT_SYSTEM, "OnNumNotificationsChanged", function(self, totalNumNotifications)
    error("test")
end)
 
local events = {
    "EVENT_INCOMING_FRIEND_INVITE_ADDED",
    "EVENT_INCOMING_FRIEND_INVITE_REMOVED",
    "EVENT_INCOMING_FRIEND_INVITE_NOTE_UPDATED",
    "EVENT_GUILD_INVITES_INITIALIZED",
    "EVENT_GUILD_INVITE_ADDED",
    "EVENT_GUILD_INVITE_REMOVED",
    "EVENT_CAMPAIGN_QUEUE_JOINED",
    "EVENT_CAMPAIGN_QUEUE_LEFT",
    "EVENT_CAMPAIGN_QUEUE_STATE_CHANGED",
    "EVENT_RESURRECT_REQUEST",
    "EVENT_RESURRECT_REQUEST_REMOVED",
    "EVENT_PLAYER_ALIVE",
    "EVENT_GROUP_INVITE_RECEIVED",
    "EVENT_GROUP_INVITE_REMOVED",
    "EVENT_TRADE_INVITE_CONSIDERING",
    "EVENT_TRADE_INVITE_REMOVED",
    "EVENT_QUEST_SHARED",
    "EVENT_QUEST_SHARE_REMOVED",
    "EVENT_PLEDGE_OF_MARA_OFFER",
    "EVENT_PLEDGE_OF_MARA_OFFER_REMOVED",
    "EVENT_AGENT_CHAT_REQUESTED",
    "EVENT_AGENT_CHAT_ACCEPTED",
    "EVENT_AGENT_CHAT_DECLINED",
    "EVENT_RAID_SCORE_NOTIFICATION_ADDED",
    "EVENT_RAID_SCORE_NOTIFICATION_REMOVED",
}
 
local function ReassignEvent(name)
    d("unregister " .. name .. ": " .. tostring(EVENT_MANAGER:UnregisterForEvent(NOTIFICATIONS.eventNamespace, _G[name])))
    EVENT_MANAGER:RegisterForEvent("test", _G[name], function() d(name) end)
end
 
zo_callLater(function()
    d(NOTIFICATIONS.eventNamespace)
    for _, name in ipairs(events) do
        ReassignEvent(name)
    end
end, 1000)

The messages that were showing up when I revived obviously were caused by EVENT_PLAYER_ALIVE.

When I join a campaign queue I get:

EVENT_CAMPAIGN_QUEUE_JOINED
user:/AddOns/test/test.lua:130: test
stack traceback:
	[C]: in function 'error'
	user:/AddOns/test/test.lua:130: in function 'hookFunction'
	EsoUI/Libraries/Utility/ZO_Hook.lua:19: in function 'OnNumNotificationsChanged'
	EsoUI/Ingame/Contacts/Notifications_Common.lua:705: in function 'ZO_NotificationManager:BuildNotificationList'
	EsoUI/Ingame/Contacts/Notifications_Common.lua:678: in function 'ZO_NotificationManager:RefreshNotificationList'
	EsoUI/Ingame/Contacts/Notifications_Common.lua:58: in function 'ZO_NotificationProvider:PushUpdateToNotificationManager'
	EsoUI/Ingame/Contacts/Notifications_Common.lua:34: in function '(anonymous)'
EVENT_CAMPAIGN_QUEUE_STATE_CHANGED
user:/AddOns/test/test.lua:130: test
stack traceback:
	[C]: in function 'error'
	user:/AddOns/test/test.lua:130: in function 'hookFunction'
	EsoUI/Libraries/Utility/ZO_Hook.lua:19: in function 'OnNumNotificationsChanged'
	EsoUI/Ingame/Contacts/Notifications_Common.lua:705: in function 'ZO_NotificationManager:BuildNotificationList'
	EsoUI/Ingame/Contacts/Notifications_Common.lua:678: in function 'ZO_NotificationManager:RefreshNotificationList'
	EsoUI/Ingame/Contacts/Notifications_Common.lua:58: in function 'ZO_NotificationProvider:PushUpdateToNotificationManager'
	EsoUI/Ingame/Contacts/Notifications_Common.lua:34: in function '(anonymous)'
EVENT_CAMPAIGN_QUEUE_LEFT
user:/AddOns/test/test.lua:130: test
stack traceback:
	[C]: in function 'error'
	user:/AddOns/test/test.lua:130: in function 'hookFunction'
	EsoUI/Libraries/Utility/ZO_Hook.lua:19: in function 'OnNumNotificationsChanged'
	EsoUI/Ingame/Contacts/Notifications_Common.lua:705: in function 'ZO_NotificationManager:BuildNotificationList'
	EsoUI/Ingame/Contacts/Notifications_Common.lua:678: in function 'ZO_NotificationManager:RefreshNotificationList'
	EsoUI/Ingame/Contacts/Notifications_Common.lua:58: in function 'ZO_NotificationProvider:PushUpdateToNotificationManager'
	EsoUI/Ingame/Contacts/Notifications_Common.lua:34: in function '(anonymous)'

I am not sure what I am missing here, but in my opinion this should work and not call the push function anymore...