There is something else to bare in mind if you are implementing any cookie fix for your clients, which isn't directly relevant to this plug-in, but might help.
I have installed a fix to 3 of my client websites in the last month and have been monitoring stats. Not surprisingly, there has been a massive drop (some 95%) in recorded traffic to the sites. Not because the traffic has actually dropped, but because few visitors are opting-in. I wasn't strongly against this law, although it did seem unnecessary, but this experience makes the whole thing seem pointless. Of course the users are ignorant so we need to protect them, but they are SO ignorant (or paranoid) they don't realise that opting in to this will protect them.
I will now have to face my clients and admit that the fix I have applied to make their sites legal is going to stop them collecting any data. Should have just removed all the tracking stuff and left it at that!
Small business gets shafted once again and us developers are made to look like idiots. GRRRRR.