You have a lot of questions here, and most of them were closed for entirely different reasons. I suspect your real reason for asking is that you feel some people are closing questions as off topic too aggressively.
So let's take them in order and see what we get:
How do I make it so that files created in a directory have a certain group ownership?How do I make it so that files created in a directory have a certain group ownership?
I don't think this should have been closed for any reason. It's complete and understandable, and a "right answer" can be presumed to exist for it. While it's a very basic question, it's obviously on topic at Server Fault, even if it might get better answers at Unix.SE or Ask Ubuntu. I gave it a reopen vote.
Ubuntu 12.04 updates broke VSFTPUbuntu 12.04 updates broke VSFTP
I don't think this should be closed, either. It seems to be complete, and seems to be on topic. I see no sign of a "home user" here. So I can't even begin to guess why anybody voted to close it.
http://serverfault.com/q/460257/126632https://serverfault.com/q/460257/126632
This was, in my opinion, inappropriately migrated. Worse, it was done by a diamond moderator. As a server configuration issue, rather than a programming or obviously development environment issue, this should be on Server Fault.
http://serverfault.com/q/460047/126632https://serverfault.com/q/460047/126632
http://serverfault.com/q/460019/126632https://serverfault.com/q/460019/126632
The shopping questions. While, technically, these could be closed as off topic because "Product, service and learning material recommendations" is specifically disallowed in the FAQ, it's not very useful to do so. The "not constructive" close reason is better used for such questions, as it better describes the real problems with shopping questions.
Apparently there is an issue with overuse of the off topic close reason. While these specific cases don't really give us a good idea of the scope and extent of the problem, it does seem to indicate that there is a problem. People would be well advised to take additional care when using their close votes, and to use their reopen votes whenever something is inappropriately closed (and should be open). It would also be a good idea to leave a comment when voting to close, especially for new users who may not know their way around Stack Exchange yet.