“Also, the term “baalei teshuva” includes a very broad range of people.” Really everyone is a Baal Teshuva as at least once a year around the Jewish New Year everyone repents so defining it maybe difficult.
I also disagree with you about a recovering alcoholic, they should NEVER be around alcohol period, the temptation is so great. One drink leads to another and before you know it they consumed half a bottle and are drunk. Here in Flatbush, Brooklyn there is a big problem with young kids drinking at simchas. Nobody is watching who is drinking and the kids hop from shul to shul getting drunk.
This means that others have to to say Kiddush for a recovering alcoholic or they have to use grape juice instead of wine. One should ask a Rabbi if this pertains to them.