I have killed 6 of these in less than 3 weeks.
I may have to hire myself out as a Black Widow exterminator. I know exactly where to look, how their webs look and their egg sacs. Fortunately for us, it's early in the year and we killed all the females before they laid their eggs sac. I did kill one male.
Three of them were found on our boat!! Oh, the joys of living next to a vacant lot with a big oak tree.