I've been playing WATCH_DOGS on PS4 for a week or so. I have encountered a few player hackers in that time, both in Online Hacking and Online Tailing situations. In all cases where my character has noticed that he's being hacked or tailed, it's felt like an accident to me, the player.
I am sure there are other times when I have had other players in my game and haven't even noticed, or are there?
The last couple of times I noticed I was being hacked, I was in the process of logging off - I pressed the Start/Options button on my PS4 controller to go to the main menu and was informed that I couldn't go to the main menu right now because I was being hacked. I also noticed that the game sound and motion continued to run in the background on the Options menu screen, so I have taken to periodically pressing the Start/Options button to check whether or not the game is properly paused (no hack) or is not paused (being hacked). I feel a bit like this is cheating and it's also affecting my immersion in the game.
My question is basically this:
If you are being hacked by another player, do you always notice and get a chance to respond?
If you do not always notice, what can you do as a player to maximise the likelihood that you will notice? For example, does it help having all the ctOS towers active / being in a connected area? Does having your phone out/pocketed make a difference? Do certain activities help (e.g. hacking NPCs, starting missions)? i.e. what is it that triggers the game to inform you that you are being hacked?