Re: Spiders: there is no "overkill"
...there's no reason to expect that thousands of daddy long legs wouldn't have attracted other - potentially poisonous - spiders hoping to feast on them.
Actually, there is one good reason: daddy long-leg spiders (pholcidae) commonly eat many other species of spiders (including some highly venomous ones) as part of their diet, either after trapping them in their web or hunting them down. I hate spiders in general, but they're the one type I'm content to allow in my home.