Apart from methanol production, the vapors produced from distilling are very volatile and can lead to explosions when not done safely.
The only danger I've found from homebrewing is spending so much time and money on such an awesome hobby.
I love sour beers, but I had to struggle to get through this one, it was like drinking vinegar.
The worst beer I remember having was in college, called Sierra Light. Uncarbonated as soon as you open it, warm urine all the way down.