They may eat their weight in insects every night but that doesn't seem to reduce the rampaging population of gluttonous mosquitoes from still covering every exposed square inch of human skin for a blood-fest.
What with all the twilight hysteria, just maybe vampires are responsible for introducing the infectious virus in an attempt protect the available blood supply by batacide.
White nose or frothing at the mouth - sign of rabies or over productive saliva glands or fungi - not that may people are willing to get close enough to differentiate.
Folklore suggests bats should only reside in belfreys or caves; therefore, colonies should cease and desist in using human habitations as condominium units.
Who are the people building bat boxes? Why would people build bat boxes for placement in the forest? Does this obsession tell us something about the psychology of the builder/placers?
Perhaps the government should fund their eviction and transportation to warmer, southerly climes where they could stay awake and do their job twelve months of the year. Ergo, no dormant period for fungi to sneak up and attach itself or themselves as the case may be.
Perhaps hospitals for bats need to be constructed, they could be driven there in batmobiles.