I have no intention of tipping at a self-serve frozen yogurt place.
You're not obligated to, but why not?
Because it's self-serve. How does it make sense to tip? Plus the service sucked.
Like I said, you're not obligated to tip. Especially since the service was poor.
Exactly. You shouldn't be tipping anyone period.
Tipping is kind of a subjective experience. If others want to tip because they received adequate service, let them.