Is it worth it for people with low hash speeds to bitcoin mine?
I'm thinking if you live somewhere cold, it's definitely worth it during wintertime! That way the electricity you're burning off (probably at a loss) warms your toes.
Just for fun, I have a Mac Pro with its stock GPU cranking away a massive 5 Mh/s... I joined a pool and it looks like after a week I've earned one bitcoin dime! (.01 BTC)
But boy are my toes warm.