I lived in TX for 11 years and I NEVER killed spider without checking it out w/a magnifying glass first. Brown recluse are difficult to identify without the aid of magnification.
I've lived in TX for 30 years off and on (going to be on again, be forewarned); I never had enough spider left to use a magnifier on.
To be fair; if it's in the house, it's dead. If it's in the yard, I just give it some room. Of course, everywhere in the world is within 5 feet of a spider.