Creative landlords can find any "emergencies" if they are motivated to snoop. I love the motion sensor and internet-enabled cameras I install around any rented unit. If the landlord comes in when I'm not there, I want to know why.
The hope behind this law is that there will be a "good guy with a gun" to stop a school shooting. Honestly, I believe it is a good idea... in some cases.
When out hunting, fishing, walking around, or just exploring there are some things that you need to be aware of when stepping foot on land that isn't yours. And in rural West Texas, you can often step foot on land that isn't yours and with hunting season around the corner, stepping foot where you shouldn't can get you in real trouble...