Lysol is a brand name of disinfectant household cleaners distributed by Reckitt Benckiser. The active ingredient in many of the Lysol products is benzalkonium chloride. This ingredient is highly toxic to fish, very highly toxic to aquatic invertebrates, moderately toxic to birds and slightly toxic ("safe") to mammals.Everything
is toxic, eventually. Even water. It's got its own MSDS and everything.
I'm definitely not a 'Kill All the Bacterias!' type. I tend to think most people, especially kids, could do with a bit less disinfecting, and a bit more dirt.
But not everyone can handle that. People who are already immune-compromised need to be able to reduce exposure to common, everyday pathogens. And there are some things that nobody
needs to be exposed to. Disinfectants like those used in Lysol or Dettol save lives.
As far as over-use goes, they sort of surface spray that OP was asking for isn't the problem. It's the every-other-cleaning-product-under-the-sun, that's the problem. Home-made, or 'eco-friendly' products are perfectly sufficient for most uses, for most people. But when we're talking about the sorts of very contagious illness that have people exploding from both ends, it's time to turn to the wonders of modern chemistry, and bring out the big guns.