I will list some examples of behavior that would be legitimate and some that wouldn't be but this is in no way an exhaustive list or guideline for what is or isn't allowed. This is only a clarification of where a moderator might draw the line.

OTF stands for Old Trusted Friend or Off Table Friend.

PGA stands for Pre-Game Alliance, but is more of a catch all term for using off table knowledge to not just make the best move but to undermine the fair and competitive nature of a game.

Explicit PGAs tend to be mostly on the lower tables as the lack of socialization makes it easier to get away with and easier to do since the quantity of lower games is plentiful. Sometimes explicit PGAs will occur on higher tables but the players are better at self policing to a point as the table level increases.

Implicit PGAs are much more common at higher level tables are the player base is smaller and the knowledge each player has of one another is greater. Easiest example of this type of play is making a lower value and lower upside move to avoid hitting a "friend". KDice is a social game and relationships do play a role in playing it, but there is a line between not 1-Hitting a "friend" and playing a significantly lower value move to avoid hitting a "friend" at all.

In a perfect KWorld who your neighbor is wouldn't matter, but players are unique and we don't all follow the same algorithm for the moves we make so who your neighbor is does matter. It doesn't matter to the point where you refuse to make the best move because you don't want to upset someone you like, this crosses the line and creates a competitive deficit for players that are newer or less aware of the "friendships" at the table.

Well I understand most players aren't as ruthless as me, I am not trying to encourage behavior some people find distasteful such as 2v1ing someone you don't feel should be 2v1d given the situation. It is an individual players responsibility though to make sure that in their efforts to play how they think is "fair" is "fair" to the game not just to certain players they are "friends" with.

KDice does not lend itself to a clear set of guidelines for what is and isn't legitimate play. Much of this is subjective to the individual advisors, but we all tend to be close to what we feel is allowable.

The best I can offer as an advisor is that "I know it when I see it." As much as I would like a better clearer standard I do not have one.

Obligatory tl;dr