The childish attempt of Sens. Ted Cruz and Mike Lee and an increasing number of other Republicans to shut down the government rather than fund the Affordable Care Act sets a dangerous precedent. If it works once, why not try it any time you disagree with an act of Congress?
Don't like money being spent for school breakfast? Refuse to OK the budget that will fund the rest of government, too. Oppose government subsidies for hybrid cars? Deny funding for everything else to keep money from being spent for those.
If the current proposals to reduce funding for food stamps don't pass, hey, just hold up the budget process hoping to get your way. What a colossal waste of time!