Red backs sometimes make a web and have egg sacs in work boots as my older sister found out.She was bitten but didn’t react too badly ,a real sting though and some nausea if I remember right.
One of my brothers was kind of horrified to find plenty in his children’s outdoor equipment in that particular part of the country,they must have moved in fairly quickly.
I’ll get a few in the garage every now and then,messy little webs in a corner behind garden pots or something.