This mod is still compatible with Patch 1.124

Update:

Jul 3rd 2025

Updated for patch 1.115

This mod was suggested by @zee. It's a very simple mod that lets NPC Sims react when a vampire is in dark form and their friendship level is below 40:

Most Sims will appear scared, similar to being near transformed werewolves
Werewolves will appear annoyed
The Grim Reaper, spellcasters, bonehilda, skeptical and macabre Sims will only throw a thought bubble
Cats will go bananas and hiss non-stop at the vampire
Toddlers will cry (if they're not vampires)

They won't react if they're mesmerized or under the influence of vampire commands.