I can’t stop people from feeling annoyed, no. But if you’re the only one submitting, then, no, those people would have no right to complain. You’d be the person keeping the lemmy alive. I would tell those people to post the areas they feel strongly about as well. Now if there’s a good mix of topics being submitted, then sure, talk to the mods about setting up some guidelines about USA-posting. But right now I look at this lemmy and see 1-2 people donating a lot of their time, and some armchair quarterbacks being choosing beggars about the effort they’re getting for free.

Generally speaking, you want to organically fragment communities when there's enough activity that you can't keep up with the parts you care about because the feed is noisy from other content. At this point, slrpnk.net is not to that point at all. I don't think anyone here would be bothered by people posting more global stuff. As of now, if we split off slrpnk.net communities into US and Global versions of the community, I'd expect the result to be all the same activity in the US communities and the Global communities being completely dead.

TL;DR: We can't post more non US stuff for you. If you have some stuff you'd like to share, we'd be thrilled to look at it