I've had some good brews there. "Devil Something". . . a little too much brimstone perhaps, I'll have to try it

I personally prefer to brew my own when I have a chance...

Mmmm... boiling wort....

I would never waste good vodka to rehydrate something that was supposed to taste like beer. I don't think i could consdier something that had been dried up into dust as beer.

However, beer does offer the possibility of preserving a supply of precious fluid that is free from nasty growths that may harm you. Nothing that can grow in beer will kill you. At least that's is written in some of the homebrewing books I've read.

I would boil any liquid I intended to make into a beer, because bacteria in most cases will not make you beer taste better.

I don't think spoiled beer would kill you. Here is a list of what commonly can be found in spoiled beer.

Bacteria:
Lacic Acid Bacteria
Lactobacillus spp.
Pediococcus spp.
Acetic Acid Bacteria
Acetobacter
Acetomonas
Zymomonas spp.
Enterobacteriaceae spp.
Pectinatus spp.

Wild Yeasts:
Saccharomyces
Brettanomyces
Torulopsis, Pichia, and Candida

Wort, however, can make quite an attractive growth medium. Very important to make sure to boil it properly. Sterilize bottles and equipment with oxygen bleach.