How do I disable this?

I wouldn't recommend disabling it, but if you must, you can do this by right clicking the MBAM tray icon, and unchecking "IP Protection".

I got an alert for an IP or website I think is safe, how can I report it?

If you find a site being blocked, and either don't know why, or are sure it's safe, please report it to us at the False Positive Forum.

IMPORTANT: When posting false postive reports, please ensure you post both the IP address affected, and if applicable, the domain name (e.g. example.com).
Follow the instructions and report it in the F/P link given in this snippet.

Actually Dwarf, JohnGault may know more about this than I do because he works with MalwareBytes.
The IP and it's Domain are very questionable as to who and what they host on their wesite:
Registration Service Provided By: NameCheap.com
Contact:
Visit: Namecheap.com - Cheap domain name registration, renewal and transfers - Free SSL Certificates - Web Hosting - Free URL Forwarding, e-mail forwarding and DNS services are included with our cheap domain names registration service

Domain name: ninjavideo.net

Registrant Contact:
WhoisGuard
WhoisGuard Protected
More info...
Ninjavideo.net - Ninja Video - whois domain