getting into space

Perhaps the old habits of killing each other will be so detrimental to space living as to become worthless, not that it hasn't always been useless, but I agree that there wont be the same things to fight over. Also, in space an attitude of co-operation will be so important that all who trade and help each other with mutual needs will thrive over any one who tries to take things by force or anyone that treats their neighbors like crap.this makes a previous idea where there is a station for every social and political group seem viable, or a natural development. Instead of trying to control a pre-existing station a person could move to the station that suits them. And it could become easier to make your own orbital living space than to take over control of another one. Of course its silly to imagine that violence will disappear, but I like the Idea written that it will be a highly ritualized professional soldier affair not unlike "early renaissance European warfare". However there is no end to the lack of reason displayed by people andthe more specialized a station is,(communist, Christian, ect..) the more appealing a target it makes to their enemies.so a mixed station might be safer. I did not mean to begin talking about violence and war in space, I hope that space will be a place to escape these things, and they are not what interest me. Perhaps the passion for science and exploration in each individual in space will outweigh everything else, making groups that feel the same way. I guess it sounds naive to think that any human trait(violence,war) that has always existed will not be present in space, but it is also niece to think that anything is impossible and to think that no change is possible. If we do not at least try to leave these things behind we are doing a disservice to ourselves, and perhaps people in space will come up with a new model of society that will be adopted on earth. though there will never be a utopia, anywhere, maybe cops in space will be more like mediators. Does anyone know, if a person spread a giant "net" in space, orbit or other wise, would it be able to collect a significant amount of anything? Like dust or micrometors or something else? also , does anyone know a type of industrial manufacturing that can be done to profit in zero gravity or in vacuum, without a lot of expensive and complicated equipment? Where the value of access to vacuum or various gravities is very high?