Space colony? One that's not a company town.
Good luck with that.
All the living space will be owned by someone before you lease your spot. If you're
lucky you will be able to have your own greenhouse for life support (oxygen/CO2 cleanup), with guaranteed power and water supplies because it's life support.
Doesn't matter if it's SpaceX Marstown or the EU Mars Colony.
Maybe, maybe not. When the lives of everyone on the station are on the line, though, such distinctions might not prove important. but actual villainous types need to be weeded not just from the population but the gene pool. Sending them elsewhere might mean their corrupted gene code propagates.
The people psychologically incapable of being inside a tin can need to be returned to Earth, though, they cannot just get sent to a different tin can to go insane. They'll probably spend the entire return flight
stoned out of their gourd for everyone's safety, sedated and in an "I love me" jacket if they're panicking.
I'm talking previously-undiagnosed claustrophobes, etc.
I'd assume there'd have to be some medical evacuation insurance in place for this. Make the people who do the testing pay for the return trip, it will encourage them to be thorough.
Actively malevolent shitheads can be fed into the equivalent of a wood chipper,
as they're an immediate danger to themselves and others. The
entire colony of others. I'm talking the residents creating an "anti-riot" of volunteers in lockstep shieldwall beating rioters unconscious before Station Security even shows up.
There's not going to be much tolerance of graffiti, either, if it covers up vital information. There's going to be millions of miles of pipes with all sorts of different things inside them, tens or hundreds of millions of miles of wire and fiber-optic, all of it labeled for what it is and where it's going.
Earthside example? railroad cars. If the "artist" covers up the data stencils, that car is going straight into the paint shop to be re-painted. If the "artist" leaves the data stencils alone or masks over them, though, that art will stay.
Hell, I'd expect that Station Admin will end up "coming to an understanding" with the station moonshiners, so that the "unofficial" stills are on the plans and properly marked. Because ain't nobody going to tolerate unmarked fluid lines!
If higher G proves necessary for pregnancy and/or childhood, several solutions are available other than returning to an overloaded Earth: not only can centrifuges be built on the surface of Luna or Mars, but habs can be put into orbit over those worlds.
Don't forget that you also need significant radiation shielding, too. Which
greatly increases the mass of your spin-grav habitats. Though if you mostly use water for that, you're talking about 1-3m worth of water thickness wrapped around the lived-in areas.
If economics was the main driving force of a Mars colonization, from where would the potential profits come ? Mining ?
What is there that could be more abundant/cheaper to mine/transport and sell than something we have here ? Seriously asking, I have no idea...
If there is profit to be made, I can understand something of the size of oils rigs or small mining town could be done. But these only last as long as there is something to extract there.
Almost all mining-for-export will be asteroids, not planetside. The only mining planetside I'd expect would be for local use, and it may still be cheaper to drop iron from orbit than to build refineries.
The purpose of planetary colonies would be
lebensraum.
edit: fixed spelling.
Well, they provide a lot of non-direct resources. Most valuable - easy to construct living space, not aligned with any existing nation. Essentially the social/political freedom, not achievable on Earth anymore.
Like I said, any space colony will have to have a very regimented and/or self-disciplined
population that has more in common with the working crew of a cruise ship than with a hippie commune.
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