I am bit confused about this theory. Our current farm is only 1 production multi-server farm, 1 TEST and 1 DEV multi-server farm. I dont have same farm replicated in Europe or Asia. It's only 1 farm in Michigan. Do I need to worry about target/manage audiences and setup Trusted my site host location?
This (https://technet.microsoft.com/en-us/library/cc262500.aspx#geodist) article talks about "Trusted My Site host locations" where it's applicable if you have multi-farm setup.
Note: Our parent company (Insurance) has global SharePoint farm where farms are setup in US, Europe, Asia, Africa and I can see they are implementing this option to prevent users from creating multiple mysites.
Now, if I am on Michigan based (child company) intranet site (different url, hosted in different data center but same domain) and I am able to create a mysite. Would it possible when a user go to the parent sharepoint site and their mysite not be generated since employee from michigan are in different OU of active directory.