You can click on one of your people, then right click on an object, and it will list things they can do with it. With the guns as an example, they can equip it or haul it off for storage. Setting them to not be forbidden just means they wont automatically haul it when that's what is left for them to do. You capture people the same way, but you also need an enclosed bed/sleeping spot in a room, set to serve as a prisoner bed (which means it needs to be apart from where your colonists sleep.) You can then click on that prisoner and use the prisoner tab to set what you want to do with them.
I don't think there is anything you can do with the visitors aside from attack or attempt to kidnap them. They just wander around for a bit, then leave. Occasionally, they might be attacked by raiders or mad animals though. When you get a communications console up and running, you can communicate with the groups they come from, but right now you can just pay most of them silver to make them happier with you.
But yes, while the colonists typically do their own thing, you have to explicitly tell them what guns to use. C=
I don't think there is anything you can do with the visitors aside from attack or attempt to kidnap them. They just wander around for a bit, then leave. Occasionally, they might be attacked by raiders or mad animals though. When you get a communications console up and running, you can communicate with the groups they come from, but right now you can just pay most of them silver to make them happier with you.
But yes, while the colonists typically do their own thing, you have to explicitly tell them what guns to use. C=