He's right - I have.
An interesting snippet I came across was the basis for my caption. Rather than rehashing in my own words, here's a snippet from Wikipedia:
Winemaking during Prohibition
The Volstead Act specifically allowed individual farmers to make certain wines "on the legal fiction that it was a non-intoxicating fruit-juice for home consumption", and many did so. Enterprising grape farmers produced liquid and semi-solid grape concentrates, often called "wine bricks" or "wine blocks". This demand led California grape growers to increase their land under cultivation by about 700 percent during the first five years of Prohibition. The grape concentrate was sold with a warning: "After dissolving the brick in a gallon of water, do not place the liquid in a jug away in the cupboard for twenty days, because then it would turn into wine." One grape block producer sold nine varieties: Port, Virginia Dare, Muscatel, Angelica, Tokay, Sauternes, Riesling, Claret and Burgundy.
The Volstead Act allowed the sale of sacramental wine to priests and ministers, and allowed rabbis to approve sales of sacramental wine to individuals for Sabbath and holiday use at home. The Bureau of Internal Revenue maintained a list of ecumenical organizations that could be used for verifying licensure. Among Jews, four rabbinical groups were approved, which led to some competition for membership, since the supervision of sacramental licenses could be used to secure donations to support a religious institution. There were known abuses in this system, with imposters or unauthorized agents using loopholes to purchase wine.
In case you're wondering what the bricks and cautionary label look like, here are some pics:
Thank goodness that jug has only been in the cupboard for 19 days. I'll remove it now so that I can't be nabbed by the G-Men for making illegal liquor!
On a separate note, it would seem that my blog has become very popular in the Ukraine over the past 2 days as I've had over 2000 visitors from there. If it's a spambot, it isn't doing a very good job as none of the hits are producing referral links in the hope that I'll click through to a dodgy website.