This isn't too big an issue if they stay in their biome, but as they venture outside it can become a problem, such as if they decide to drop their mounds right on a pig house they flock towards when night falls and their lights come on.
Steps to Reproduce
Lead a homeless gnat swarm to a structure that functions as a light source
Lead a homeless gnat swarm to a structure that functions as a light source
A developer has marked this issue as fixed. This means that the issue has been addressed in the current development build and will likely be in the next update.