There's a difference between being a British colony and allowing Britain to have a military base on your land, so nothing in disagreement with the original post there
This one's very personal, it's only a good thing to do if you genuinely really enjoy it.
I used to be a maths teacher and I love maths, and would do it for fun outside of my job. That in turn often helped with the job itself, and certainly helped to keep my interest in the subject alive even when 90% of the job was teaching fairly basic stuff that wasn't particularly exciting.
I'm now a software engineer - I'm much happier in my job, but I don't love writing code enough to ever want to be doing it outside the 40 hours a week I'm paid for. I'm slightly jealous of the people who do, because I know first-hand that it's a great way to do better at work and keep feeling fresh and interested in what you do, but forcing yourself to do it doesn't bring any of the same benefits.
Not an expert in the law or in this case, but blocking large companies from acquiring other companies which operate in the same space in order to cement monopolies is a pretty fundamental part of what a competition regulator is there for, it's hardly "bad law" or some arbitrary campaign against facebook