Hay thanks for all the suggestions. Let me elaborate a bit more on what I am doing here, now that I have more information.
One pin will be used to drive a G6HU-2-DC5 Low-Signal relay, no issues there (I don't think).
I will be using 3 other pins as "User interface Pins" where the user will feed a ground to a pin to signal an event. If I could rely on the user to always connect a ground to the input I don't think there would be an issue but I can't rely on that. So, what happens if the user connects +14 volts to the input? Will a simple diode suffice?
Is a 1K ohm resistor sufficient to hold the pin high until a ground is connected to the input?
This is what I am thinking,