Inspired by the “Armoured Spider Egg Chair” post.
My bedroom is on the ground floor and the window opens up in to my conservatory. Over the years, many spiders have taken residence in nooks and crannies in the conservatory. I used to regularly clean them out until we had a heatwave in 2018, when I observed that their residential status was helping keep the insect (especially mosquitoes) population at bay in my actual flat. My conservatory is a mosquito restaurant and acts as a buffer to the little buggers getting in and eating me instead.
So every year, I wait until the end of September then go and clear away any remaining webs. I very rarely see a spider in my actual flat, so it seems to suit both me and the spiders.
When I tell friends of this symbiotic relationship they shudder in horror.
YABU - Urgh, kill or evict ALL the spiders
YANBU - You are a very clever lady spidey whisperer