Folks who use this frequently, like for late night outings, might not have this issue, but for those of us using RaveGuardian to contact University law enforcement, in the moment of a crisis, either will not be able to enter or will forget the complex password you require.
In an emergency, rapid contact is key. Even folks who remember their own will be fumbling through the key pad in a stressful time. The "phone call" app is faster.
Put an emergency call button on the screen - pre-login. Let the dispatchers authenticate while having the other resources RaveGuardian provides. Otherwise, in an emergency, I will opt to place a phone call.