I don't anticipate this being a big problem but I'm curious to know if a line needs to be drawn to keep micro brewing (large batch brewing) out of the site. I don't really see a lot of harm in allowing it but then again it may be a slippery slope.
I think it would be better if this forum was simply "Brewing". I don't think there will be many messages from anyone other than home brewers, but I see no need to limit it.
Years ago, on the newsgroup rec.crafts.winemaking, I remember a few messages from a guy who had started a very small winery. Those messages were interesting and it would have been a shame if something like that happened here and the pro brewer was booted out for not being a homebrewer.