Joining in on the 'bugs don't belong in the house' pet peeve discussion. I live in the deep south, and we have those huge roaches (sometimes called 'Palmetto bugs', but that pleasant name is not fooling anybody) that like to visit inside. I've heard that it helps to keep no food or water out (not that I generally leave uncovered food lying around), but I have two cats, so there's always going to be at least dry cat food and a bowl of water around. I haven't seen many lately, because I see them mainly when there is a lot of rain (they come in to get dry?) or not enough rain (they are coming in to look for water maybe), but I do see one now and then. One of my cats loves to hunt them, and if I'm anywhere in the house and hear her make that high-pitched 'rwow, rwow' sound I know that she's either getting ready to hork up a hairball or she's on her way to bring me an offering of a live bug. Either way, if it's dark in the room I'm at the time, I have to quickly turn on a light so I can see what she's doing.
Spiders are not welcome either. I know they eat other bugs, but they need to do that outside. I remember years ago (pre-cats) I was the bathroom and happened to casually look down at the floor right next to my feet. There was the biggest spider I had ever seen. I immediately screamed, jumped up and ran into the bedroom to grab a shoe. When I swatted at it I missed and it scrambled up into a wicker wastebasket. That sucker was so big that I could hear it scratching as it ran up the wicker. Of course, the basket was full of dental floss, tissues, etc. I tipped the basket over and pounded the heck out of everything that fell out. Wham! Wham! Wham! I smushed it good. I looked it up later and it looked like a nursery web spider (google it. I won't provide a link to the creepy thing) and I guess it came in the open window (around the screen somehow). I never hope to see a Cujo spider like that again. I'm glad I didn't have my cats at the time, because I guess my hunter cat would have caught it and dropped it into my bed as a present for me.