Today I decided I wanted to do my part in helping clean up smp8 Frontier. I wanted to clear out my res of all the dirt so I spent HOURS digging the dirt. I brought over a double chest of dirt and decided to begin the long task of cleaning everything up.I jumped into the Frontier Center and walked just outside of the safety zone and saw a nightmare. People had been strip mining, leaving random half torn down dirt huts, dirt pillars. If you have been to the frontier you know what I am talking about. Its hard to tell the difference between the Frontier and the Wastelands.I began placing dirt above all the holes. I dont have near the resources to fill in every hole so I decided just to make it look pretty by covering them up. I was cleaning everything up for maybe an hour when another player decided to come over and fight mobs. I didn't mind at first that they were killing mobs until I realized how badly they were at killing them.I watched as this person (who will remain unnamed) couldn't kill a creeper to save their life. They just allowed the Creeper to blow up. Not just one or to but all of them. Leaving a Creeper crater in the process. Not only was he doing this in an area I had yet to get to but also in the area I JUST cleaned up.I watch him blow Creepers by other peoples buildings that were clearly being used but also the area I was still working in.I messaged the person asking if they were going to to fix all the holes they just created. I got no response. I could see that they were reading the messages as they would stop and stand still for maybe 5-10 seconds after every message I sent. The person just walked off like nothing happened. Now when is it considered griefing? I dont think the person purposely lead creepers over to blow them up but they allowed them to blow up my hard work along with other buildings and did nothing about it.Isnt it part of our responsibility to fix mess ups that we cause? This server is going to go down the drain when people start leaving because of their hard work getting destroyed with no repercussion done to the people.If there are staff reading please give your opinion on this matter because something has to change. Isnt the Wastelands suppose to be for mining? Not the Frontier.