Occasional excessive drinker reporting in. You're right, "excessive drinking" is difficult to quantify, and any vagueness of definition will leave us with what

Occasional excessive drinker reporting in. You're right, "excessive drinking" is difficult to quantify, and any vagueness of definition will leave us with what I would call "vagueness" or "incompleteness" of data. Not "inaccuracy" though, because I think we can understand the limitations of reporting, and the trends are likely correct.