Look at tone, writing style, and choice of words. If 2 accounts are owned by the same person, they would be very similar in that regard.
LOL
I know with a moral certainty that there are users here (not myself, btw) who have other accounts, and the community is not even the least bit suspicious...most of the double accounts in the past were actually only revealed because the person told their friends outside the forums, and that is still true now as well...even if it's obvious that an account is probably a troll smurf, it's not necessarily obvious who it is just by their style and tone...
This isn't a college class where we are focused on writing research essays...this is a forum where trolls have all the time in the world to deliberately pretend to be someone else...sure, some might get caught, but more likely it's because they don't care or actually wanted to get "caught" in the first place...
Quite frankly, most of Sinkillr's smurf accounts are associated with him because he made absolutely no effort to hide them...hell, people get away with smurfing on ICO all the time....despite cluttering up the chat with plenty of evidence for "style" in addition to evidence of their playing habits, most go unsolved except for the few friends they tell on TS...
More importantly, I guarantee you I could make an account today, say some stupid stuff about flak being OP, and you all would think it was Sinkillr regardless of what style I used...I also guarantee you Sinkillr could make an account today, say some stupid shit with ellipses everywhere, and you all would think it was me...
Style proves nothing on internet forums...all it provides is a talking point about who's who in the latest book of trolling...
But let's put all this pansy anecdotal he-said she-said bull aside...let's do some real, hardcore, objective research...
Tell me, is HummerX and Sinkillr the same person, or different people? What does your analysis of style tell you?