Fertilizer would be welcome, pesticides less so. Fortunately, one doesn't really need pesticides on lawns, particularly if one doesn't have a dislike of non-grass species (like clover, which helps with fertilizing anyway).
That might depend on where you are. In my part of the US, fertilizer runoff is causing very serious problems. This is mostly from farms, of course, but domestic lawn care is a major source as well.
The push around here isn't to get people to stop using it entirely, but to follow proper practices that minimize the runoff.
I live in a very high tick area in upstate NY, and I've never seen this. I certainly don't do it and have had no problems. Now, if I wander just off the lawn into the woods, I better be wearing my permethrin clothes.
