You can't do that. Without the key being programmed, the immob won't let you in and the alarm will go off as soon as you try - that's what the 'chip' 'programmed key' is for, otherwise people would be stealing cars quite easily like in the old days.
Yes you can I've done it
How do you think I do cluster swaps, the keys aren't coded to the cluster when the ignition is switched on for the first time, all they need to do is turn the ignition on to get power to the cluster and then code them in to the cluster and the CCM.
Also the key "not being coded" has nothing to do with the alarm, all that is in the key is an immobiliser chip this doesn't have any effect on the alarm only the immobiliser