BLOCK activate.adobe.com with LittleSnitch !
Another method is to edit the Host-file.
You can use terminal to give TextEdit root access to the hosts file. Open a terminal window and enter the following:
sudo /Applications/TextEdit.app/Contents/MacOS/TextEdit /etc/hosts
Hit return and enter your admin password when prompted and again hit return.
Your Hosts file should automatically open in TextEdit.
Add the following to the open Hosts file:
127.0.0.1 activate.adobe.com
127.0.0.1 practivate.adobe.com
127.0.0.1 ereg.adobe.com
127.0.0.1 activate.wip3.adobe.com
127.0.0.1 wip3.adobe.com
127.0.0.1 3dns-3.adobe.com
127.0.0.1 3dns-2.adobe.com
127.0.0.1 adobe-dns.adobe.com
127.0.0.1 adobe-dns-2.adobe.com
127.0.0.1 adobe-dns-3.adobe.com
127.0.0.1 ereg.wip3.adobe.com
127.0.0.1 activate-sea.adobe.com
127.0.0.1 wwis-dubc1-vip60.adobe.com
127.0.0.1 activate-sjc0.adobe.com
The entries should ideally be made between the existing broadcasthost and ::1localhost entries.
Save the file and quit TextEdit.
Now, If using Leopard, you should use Terminal again to flush your cache:
sudo dscacheutil -flushcache
You can also do the same in Tiger with the following Terminal command:
lookupd -flushcache
NOTE: In general it's recommended to install & register apps offline
if possible, and block apps connecting to internet if not needed!