If you read pippy's statement carefully

  Also I have no idea what my users will do,
  and I'd rather have faulty data inserted than none at all.

you'll see we're in agreement - PostgreSQL's design and feature set makes it clearly superior to MySQL in preventing the spread of faulty data. But pippy would rather a garbage database rather than be slowed down by preventive measures. It's costing him development time after all...

By the way - thanks for all the great work on PosgreSQL range types.