Messages on the mac, different user accounts

If you sign into messages on your own password protected user account on a shared mac with different user accounts, will other user accounts be able to access your messages from their account?

Hi,
This is really a yes, no, maybe answer.
If you set up new Mac user accounts on your Mac and never use any of the details that you use in Messages (any account) then, No.
If however you set up a Mac User account to test and entered the AIM Screen name you use then the Keychain and the .plists may remember some of that account details.
This could be a problem if you then let someone use that Mac User account.
There are ways to get the password info in the Keychain.
To explain  a bit more of the how.
If for instance you created a test Mac User account and set up Messages here.
You could then turn On Parental Controls if it is not an Admin account
If you set the Messages settings then you can not add Buddies to the lists
You cannot chat to Buddies unless they have been added to a list in Parental Controls.
At thie point all your Buddies are Blocked.
Going back to your regular account will find they are blocked there as this function flags the Buddies at the Server end.
If you then add some Buddies but not all then in the AIM Account they become the Allow Specific People list and everyone not in the list is Blocked.
The Allow/block situation remains the same  (even if you move computers or try a web login to AIM)
The same regarding using  the same Apple ID in this Mac User account as it's details are held in the .plist
Also if you had an older Apple ID that you then registered for iCloud and received an @me.com email ID in addition and later an @iCloud.com one you can use these Apple IDs independently of each other with regards to iMessages.
However the server will keep trying to add these to your iMessages account in Messages.
I have not tried creating a separate iMessages account and testing this yet to see if the main Apple ID would try to get added to the other set ups
Basically the answer is no.
However be careful if any of these Mac Users Accounts  were set up before and have tested anything you use in your Messages app.
9:35 pm      Friday; December 6, 2013
  iMac 2.5Ghz 5i 2011 (Mavericks 10.9)
 G4/1GhzDual MDD (Leopard 10.5.8)
 MacBookPro 2Gb (Snow Leopard 10.6.8)
 Mac OS X (10.6.8),
 Couple of iPhones and an iPad

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