How can I disable Library/Home Sharing in iTunes?

Question

So, i have two apple computers connected to the same network, one iMac connected via ethernet cable, one MBP connected to wifi. There are also other apple products connected to the same network but i don't think they have any relation to the problem that i have.
On both machines i have Home sharing turned off and i have even disabled all the options from the General sharing menu (outside itunes). Despite all this, i can see on both machines the other machine's library and i can play everything, music, videos, playlists, etc. What is even stranger is that in iTunes general preferences i have unchecked 'shared libraries' so i shouldn't see it even if it was shared. I have even tried to activate home sharing but to select nothing in the sharing list...no change. i am not even loged in to itunes or app store. Both macs have 10.8.3 and itunes 11.
What i suspect may be related to this:
Initially i had only the macbookpro with a user id, password, library name 'username's library'. After i've bought the imac i have set it with the same accound name, password and of course library name was the same. At some point i had home sharing on both machines since i used the same apple for it.
Does anyone know how to fix this? I mean normally i wouldn't care but i think that because of this, my imac does not go correctly to sleep, or wakes up when i open itunes on the other machine. I have wake on demand ON and i do not want to turn it off since i keep it on to ssh from the MBP and run some scripts, etc while the iMac is sleeping
Any ideea is welcomed! Thanks!

Answer 1

Welcome to the Apple Community.
You would only need homesharing on your iPad if you want to use the remote app (which is quite handy actually). To be able to use the iPad with the Apple TV, you use AirPlay, but the iPad won't show up in a list on the Apple TV, you send content from the iPad itself.
Assuming both devices are on the same network and that AirPlay is not turned off on the Apple TV, then simply tap on the screen when you are watching content you wish to stream to your Apple TV, then tap the airplay icon that appears in the control bar, choose the Apple TV from the menu that appears.
When displaying the content you wish to mirror on the iPad 2 (or better), iPad Mini, iPhone 4S (or better), double tap the home button (quickly) and swipe the bottom row of apps to the right to reveal the playback controls, tap the AirPlay icon and select your Apple TV from the list of available devices.