If y'all would quit killing the spiders, you wouldn't need to use the D-Con to get rid of all the bugs... the spiders would do it for you.
Black widows are deadly but they're very gentle and not hostile (in my personal experience). They'd rather check you out than bite you, I've held them on my hands many times. (Yeah, I was young and stupid.)
Daddy longlegs are the coolest things, love 'em