This is a bit out of scope the moment to add a settings via admins or so to disable this. The main issue is that the app itself has no admin panel or such, in fact not even a concept of admins, so this will have to be done at a later stage. For the moment we try to get closer to what google calendar has as a baseline, and that has pretty much exactly that in the UI without a way to disable this as far as I can tell. But not to discourage feedback here, keep this coming, we will revisit those either way!