Wasp killer is a terrible self defense tool. Its effect takes minutes to kick in and you’re likely to be beaten to death by then.
Use a standard OC spray and leave the wasp killer to wasps. Search for videos on wasp spray being used on people to prove how poorly it works.
Wasp killer is a stoopid idea. They can retaliate in kind, and there are a lot more of them. The correct solution is superior firepower and a demonstrated willingness to use it.
They are going to be tossing Molotov cocktails next. Rachel Maddow, Chris Matthews, Morning Joe and Mika better get on their pulpits and denounce this kind of behavior, without reservation, without any < wink, wink> and in the strongest possible terms, or their turn will come shortly.