Edit / Delete event(s) from a synchronized calendar client(s)-only

When a single event of a repeating events or from a read-only synchronized Calendar does not take place or is irrelvant to a person, it can not be edited on the client side at the moment. Whilst I can understand the synchronization problem (overiding client changes) I may have a workaround for that: How about an "Overlay" (strikethrough/crossout) or a clientside blacklist that containes the events that should not be visible anymore? void LoadEventsFromCalendar(string url){ if(events.any(event e => blacklist.any(e.Id)){ e.AddToCalendar(); } } Thanks for your great work! Greetings Maurice