Replying to Another summer setup question

I just made a thread a few weeks ago about a summer set up, but forgot to ask this question. Today i'm going to lowes to buy the materials, super stoked. Im making it almost exactly the same as the sticky thread in build a jib cult. One thing i didnt see mentioned, is if its anchored into the ground. My dad is worried that it might fall over or something. So, picture the same one as the sticky, and do you think his was anchored, or is yours? I know i could comment on the thread but i need some quicker answers. So, save the day NS! Thanks