You can kill spiders and still be pro spider. There's nothing wrong with killing recluses and widows in your home. But if they're in a field, I leave them be, because that's their home.
I do feel sorry for the widows, because the charges against them have been so ridiculously trumped up. Domestic dogs are the number one killer animal in America, but people's first reactions to them aren't "kill it!" The only animal allowed nowhere near my property are cats. I have never seen any creature wreak as much havoc as those awful things. I'll take oodles of black widows over one or two cats any day.
No offense, cat lovers, I'm not trying to incite any riots.