[andy.s]

There are actually several ways to achieve that, but the most simple one is:

local org = ZO_PlayerToPlayer.AddPromptToIncomingQueue
function ZO_PlayerToPlayer.AddPromptToIncomingQueue(self, interactType, characterName, displayName, targetLabel, acceptCallback, declineCallback, deferDecisionCallback)
    if interactType == 19 then
        return {}
    else
        return org(self, interactType, characterName, displayName, targetLabel, acceptCallback, declineCallback, deferDecisionCallback)
    end
end
 
--ZO_PreHook(ZO_PlayerToPlayer, 'AddPromptToIncomingQueue', function(self, interactType)
    --if interactType == 19 then return true end
--end)

I commented ZO_PreHook, because it will produce lua error, since zos code doesn't check if the prompt was added and will just try to access nil value. Also INTERACT_TYPE_TRAVEL_TO_LEADER = 19 is a local variable, so have to use a raw value... But it does its job