This chapter highlights how events can affect public spaces in detrimental ways: by contributing to their commercialisation, privatisation and securitisation. Eventification is used to refer to the process through which events denigrate public space. But large, commercial events are responsible for making urban space less public and these detrimental effects are discussed in the chapter. Mega-events and their associated activations, such as fan zones and sponsor installations, seem particularly culpable. A commercial fashion event is represented as a type of street festival allowing it to accrue some of the positive connotations attached to such events. A key issue when assessing events as tools of privatisation is whether people should deem major events as public or private functions. Urban development is driven by economic priorities but elite anxieties and insecurity are also important drivers. Staging events in public spaces rather than traditional venues also has other knock on effects.