There's a certain right to privacy that generally disallows people to take nude photos of you without your knowledge and consent. Stalking is generally considered a crime. He'd have to talk to Collin about that, or perhaps email Emily a ban appeal and see how she feels about it.
Not threatening exactly, but if Emily was on, it is kind of like a threat to reveal the non-existent pictures.
it does not matter if the images were present or not. just threatening to release them is enough proof to take action. people have been jailed and/or taken into custody for merely threatening to cause a shooting at a school.
If ha actually had the photos, then it would violate that right, but since he does not, it does not violate that right. Also the taking of photos without consent would be on a base by base case, depending on a the location of the photo. If it was in a public place, then it inherently becomes "public" as long as they are not posted on sites I censored that are not age restricted.