Don’t know about sensitivity of WF gear. Still waiting for mine but I run the Blitzortung Blue receiver in Galway.
They are very sensitive to stuff like electric fences, switch gear and arcs. Even a cigarette lighter with a piezo sparker held close to the antenna will cause a false.
A lot depends on antenna positioning. A lot of noise can be subdued by rotating the antennae or moving it. It can also be shielded.