Killing mosquitoes is nor a sport or inhumane action. Killing mosquitoes is an act of self defense since they are transmission carriers of Malaria, West Nile Virus, and I don't know what else.

I am also in the group that kills to defend or eat, and that includes fish. Like the man said earlier, there is no thrill in killing for "sport" after hunting and dealing with 2 legged animals that shoot back.