Use a pin code to keep anyone from changing your settings or viewing your guests.
From the Kiosk, tap the settings gear and select "Customize". Scroll down until you see "Kiosk PIN" underneath "Security Settings", then set your 4 digit pin code. Be sure to remember this because it will lock you out!
Hide Name Search
Don't want everyone to see each others' names? You can easily turn this off in the Kiosk customization settings. Tap the settings gear, select "Customize", then find "Autocomplete Names" and toggle that section off like seen below.
Toggle off autocomplete: