I'll hot compost any plant waste I can get my hands on free!
All grass clippings are totally safe for HOT compost piles.
Even if the grass was sprayed with herbicides from golf courses. Mostly all grass herbicides used today by homeowners is biodegradable. The only problem is, most casual, passive composters, don't get their piles hot enough, long enough, to stimulate the high thermal bacteria, and release the extreme internal heating, to literally cook out the herbicides, pathogens, etc.
Without good aerobic composting, some of these herbicides take several years to break down into safe compounds for the soil and plants. Via aerobic hot composting, this process is accelerated to mere weeks!
If you have any questions about herbicidal chemicals used on plant wastes, just try to get your compost piles hotter, and keep them moist and constantly aerated. Use lots of nitrogen/microbial composting activators like dry molasses powder, urea (urine), and even old compost teas. They all help speed up the decomposition.
The entire Kingdom of God can be totally explained as an Organic Garden (Mark 4:26)