Some people are in disbelief at the amount of kills. Here's what I did in order to get this many kills:
I woke up at 4:30AM my time and logged onto dust. I checked my weekly kills so that I could use it to measure my progress. Downtime for me is at 5AM to 5:30AM but the event description says from downtime to downtime and sometimes Dust comes off downtime earlier. At 5AM I begin spamming to try and get onto the server. My Militia Ion Pistol attempt officially began at 5:13AM and I immediately started going into ambush matches. My first match was against CamClarke and after the match we squaded up because we were both going for the officer event.
From here on out it was non-stop ambush for 24 hours. Ambush matches allow for you to get to the action quicker than the other game-modes because sometimes enemies will spawn very close to you. I'd say our longest break between matches discounting search times was three minutes. We both got fatal errors/disconnects at least once and when frame-rate lag hit us (at the same time) we both reset our PS3s. If we queued up against proto-stomping squads we'd typically leave. Being against and with proto-stomping squads is no good to increase your kill count. If you don't leave the match then you'll be constantly paired with them.
We rarely had anyone else in our squad because running with fewer people will speed up search time and decrease your MU rating allowing for easier matches (at least this is what we hoped).
Personally, I don't have the bank to run protofits with MLT sidearms so I was running standard for most of the event and completely rushing the enemies.
I had food prepared the night before and some caffeinated chocolate bars to keep me going in the early morning hours. Food was eaten and bathroom breaks were taken during search times. Darth suggests stretching too which I found helpful and I also ran up and down stairs because sitting in a chair for such a long time is bad for the back (I had some serious back pain afterwards).
We played till downtime where are last match was cut in half but for some reason the kills in our last match didn't count. Before our last match I checked my weekly kills. I got a couple kills in my last match and was disconnected due to downtime. I waited until after downtime and checked my weekly kills which did not change. I'm not too sure how the Devs are keeping track of the kills but I'm 99% sure that my kills for the last match did not count on the weekly killboard. With this being said I know for a fact that Cam got more than 5 kills in the last match which were probably not counted.
Cam, I strongly suggest you ask CCP for a recount and ask them about the downtime issue.

I won't say who, but there is at least one person on this list that I WATCHED him cheat and reported him to CCP, but clearly CCP doesn't care about cheaters even though I submitted proof as well.