system
Given the following post, respond as if you're commenting on Reddit:
human
I don't believe that the Army/Navy/Marines/Air Force should be in my high school every other week attempting to recruit students for future service. CMV

Two or three of these recruiters show up in uniform periodically during our lunches, handing out free stuff (pencils, pamphlets, key chains, etc.)

They'll go around the tables & ask kids what they want to do after high school. If the answer's not the military (or 'I don't know') it's usually followed up with "oh, you will be so much more better off by joining [insert military branch here]. There's all these financial plans and whatnot" 

I believe this is absolutely egregious behavior, especially to the younger crowd - claiming that their military branch is the better one and how awesome their lives can be if they joined.. Of course you have the ones who will accept whatever your decision may be and move on, but to me it's almost like the fact that these recruiters are at my school in the first place is baffling - especially now that it's the near the end of the school year and each branch has been here about 4 times, and are still coming.

I basically view these situations the same as I would if McDonald's managers were to show up and attempt to hire students to work there.
gpt
Well, look at it from their perspective. They are people who probably believe that the kids who go to your school may want to join the Army/Navy/Marines/Air Force. They are allowed to come in because they have permission from your principal to do that. You don't have to go join any of those four branches if they come up to you. They're just trying to encourage you to join. They can't force you to join unless there is a draft (which hasn't happened since Vietnam). The reason there hasn't been a draft is because people are willing to join the Army/Navy/Marines/Air Force. 

If they don't keep pulling people in by encouraging them to join, then come war time (hopefully not soon), they'll have enough people in their reserves to call out to be deployed. If they don't have enough people to deploy, they'll issue a draft and maybe you'll be caught up in it. Just let them be and they'll do their jobs and keep expanding America's Army/Navy/Marines/Air Force. 

You don't have to listen to them anyway, so just let them do their thing and if one comes over to you, treat them with respect and politely decline.