How do you manage de social interactions ?

By Taratata, in Dark Heresy Rules Questions

I wanted to know how do you manage social interraction and the disposition system.

Personnalities seems curious, because some times DoS can lower the disposition, and sometimes DoF can increase the disposition, it is strange because it doesn't say anything about the contrary, if a DoS increase the disposition, what does a DoF (nothing ?). Do you reroll disposition after each social roll succeed ? If it is the case, when does the conversation end ?

Thanks.

I rather use them as guidelines rather than hard rules, because those are way too much bookeekeping and even quirky in my opinion. I must also admit that I didn't go further than read time 2 or 3 times, so I'm not very knowleadgeable about these rules.

It looks complicated at first glance (and I haven't done much more than glance at it), but it seems like a (little convoluted) try to get the fluid nature of social interactions into rules. (But after the desastrously stupid social interaction system of Exalted 2E, I'm happy to take anything that isn't THAT f*ed up)

I normally just improvise social interactions, but am planning to run a test session, where I stick to the rules closely, just to see how they fare.