One major defect with the NOTAM system is that there is no central body who makes sure that NOTAMs are formatted in a standard way. What this means is that the main text of the NOTAM is not fit for any parsing system that demands good machine readable data.
In some cases (usually where airspace is created by NOTAM) we take the extra steps to go through the NOTAM text and properly draw the true lateral limits of that created airspace. Unfortunately, this cant be a fully automatic process (yet) and so broadly we will fall back on the Q-line, since that is the one part of the NOTAM which is consistently formatted.
Obviously ChickenHouse is entitled to choose their flight planning tools based on whatever metrics they choose, but to say that we knowingly present incorrect data is false and misleading. Not only do we work very hard to present a correct picture as per the official data, but we also help AIS units to present their official data in a more streamlined way that benefits users of all products. If anyone sees anything that causes them to question our accuracy I would implore them to draw our attention to it - we may be able to immediately resolve the matter within the SkyDemon code, and if not we will address it to the relevant authorities.
Rob | SkyDemon