Publishing Reading Levels to Parents

Our school has an unwritten policy not to give parents reading levels after the initial parent/teacher conference in the fall.  Parents in the past have used this to compete with one another about their kids reading levels.  The school decided to keep the levels quiet and not post the actual level on the report card. On the report card we just put if they are Exceeding, Satisfactory (at their right level) or Progressing.  I just had a parent e-mail me this week wanting to know what level their child was on so that they could check books out at the library.  The information of their child's reading level was irrelevant because the library does not level books like we do for testing.  I keep going back and forth with posting actual levels. For my own children, the teachers give me their reading assessments.   They don't use the same testing kit that we do, so it is very confusing for me.  At the end, I just need to know if they are at least where they should be or advanced.  Being behind would be a concern but one that the teacher's would have had to tell me about.  I'm not sure if posting reading levels is a good thing or not.