I've got a well established 31 tall fescue lawn growing in Atlanta's hot
clay soil (nicest one in the neighborhood, actually). I've always used the
grass catcher on my mower but I'm getting tired of emptying the bag all the
time.

If I just let the clippings spray out onto the lawn, would I get thatch
build-up--- or would the clipping just disintegrate? And how bad is thatch
anyhow?

Jos.