Here's what I just did.
1) Factory data reset back to stock. Take out Verizon SIM card.
2) Turn it on and don't enable WiFi, don't login to any accounts (Google/Samsung), don't set anything up. Just get to the OS and immediately disable DT Ignite.
3) Disabled the basic Verizon apps I don't want. That includes Verizon Cloud, Message+, Caller Name ID, and VZ Protect.
4) Enable WiFi, add Google account, and let the on device apps (mostly Google and Samsung) update.
5) Confirm that automatic updates from Google Play are disabled.
6) Rebooted several times to watch what happens. No new installs.
7) Confirmed that DT Ignite was still disabled and then inserted my SIM card.
8) Watched as Caller Name ID, Message+, VZ Protect, automatically re-enabled themselves. Then watched NFL Mobile, Slacker, and hum install automatically.
Any ideas on what other service to disable that's causing these apps to install as soon as I put in my SIM card?