I have changed the ownerships of $HOME and subdirectories to only have default "owner" and "group" permissions using the following command:

Code:
~$ chmod o-rwx -R ./* ./.[!.]*
Can this potentially cause any issues?

Background: I have several users on the same machine, and would like to isolate their documents and workspaces from each other.
Each owner has an own group like: tom:tom, jerry:jerry, acme:acme
On top of that, my own adm account as well, where I've done the same thing.

Until now I've seen no ill effects, but the devil's in the detail.

Thanks.