This reminds me of Google's efforts to reduce harmful mosquitos in Fresno, CA by introducing millions of sterile mosquitos (http://www.npr.org/sections/thetwo-way/2017/07/21/538470321/...). I visited Fresno last month, and Fresnonians seem generally very annoyed at the insane amount of Google mosquitos in the city now but remain hopeful that this will be better for them in the long-haul.