I was searching through the posts for exact situations to influence HK47 while playing a LS character and i found this post, i'll just paste it here...
Well I managed to totally lose influence with T3M4 by being mean as much as possible and was able to get the final wisdom bonus for the PC.
I suspect that losing influence completely with the NPCs that can become Jedi work the same. Take the NPCs with you that usually give positive influence with LS events and do the exact opposite. Kill innocents and treat them like dirt. When influence is completely negative (and can't go down anymore), you will have completely "broken" them and should have opportunity to turn them to Jedi. Only Atton seems to respond well to gaining influence whether with DS or LS acts depending on how you handle them. Only thing is, though they turn Jedi, in all likelihood, they will be completely opposite in alignment to your PC LOL.
Next time, I plan to take Hk47 along and do acts which he is completely critical of to totally lose influence with him and unlock his conversation to gain the stat bonuses.
Heres a link to the thread but it doesn't offer much insight http://forums.obsidianent.com/index.php?showtopic=32175&hl=#
What i want to know is has anyone actually tried this besides this person with any success? I personally don't believe the game's 'influence mechanics' is intelligent enough for this to be possible!?
Of course it would make plenty of sense that it should work that way for a DS exile of course i just can't believe that the game is that smart or this would be a more popular option.
Edit: Adding a bit more to support Jeremiah's theory.
http://forums.obsidianent.com/index.php?showtopic=32767&hl=
Its just one post, no replies for some strange reason.
Now i'm wondering if i get HK47 and be a complete angel (since i'm LS) to the point of making him sick will that unlock his back story once he hits 0 or negitive influence?