You can change how much the firewall nags you, they tried to make it user friendly as much as possible without sacrificing security.
With CIS5, they added an AV, sandbox and HIPS (which is better than the one in CIS 3).
Yes, CIS is definitely better.
I used it since 3, but it wasn't really user friendly. They added AV, sandbox and improved the HIPS, you should try it.
LanGuy99 did some tests on Youtube, take a look at them.
http://www.youtube.com/watch?v=-sN7ISKNeGM
Where did you read you can't kill someone ?
You can PvP in GuildWars 1. Guild Wars 2 will also have that and more, with large scale battle in World PvP.
Do you mean PK ?
I think it's already the case in France with the operator Free. I experience some massive throttling during evenings and week-ends, which doesn't happen if I go through a proxy.
Ho ?
I thought Titan's Quest didn't work well because of the lack of a good piracy protection (the game crashes due to the crack).
And the lack of dedicated servers (like battle.net) is also a problem, they used gamespy "matchmaking", and the players host the server and it's a real problem if they use cheats, it ruins the game.
Guild Wars came out at the same time as WoW and is still successful, Guild Wars 2 is one of my most anticipated games.