Roundup - to use or not to use?

I have a love/hate relationship with roundup. It is good, because it kills anything it touches. It is bad, because it kills anything it touches. 

Some info about round up: 

• It is systemic, so if it touches the leaf, the chemical enters the plants vascular tissue (like veins) and attacks the entire plant. In a few days, it turns brown. This includes trees. 
• WEAR A MASK. This is not something to inhale
• WEAR GLOVES. We are made of cells. You don't want this in your cells, at all. 
• Spray at your own risk. We are not asking you to spray, but if you choose to do so, know that there are health consequences of inhaling. 

If you choose to spray: 

• Spray any areas of granite 
• Spray walkways 
• Don't spray to "edge or trim" (if you spray the end of a plant, it will kill the ENTIRE plant) 
• Call Ms. Windwehen for more specific instructions (361-648-3814)