Christen Steidl thinks it took way too long to hear about the creepy-looking guy hanging out near the school.
"I would have wanted to know at the end of the school day," said the Oak Hills Elementary parent, echoing the lament of dozens of others on the Lakeville school's Facebook page.
But the district itself is more cautious.
"The last thing we want to do as a district is to have parents feel like their kids are unsafe at school," said Linda Swanson, Lakeville's spokeswoman. "At the same time, we don't want to alarm them without good cause."
A recent sequence of events involving a self-appointed tester of the district's security arrangements has raised delicate questions about how schools should react in an ambiguous situation, well short of a full-blown crisis such as a shooting.
With cellphones allowing for constant interaction between parents and kids and school violence often in the news, school communication has entered a new era, one in which parents expect to know immediately about everything that happens at school.
But experts say it has to be handled on a case-by-case basis.
"How a district chooses to [communicate about crises] is as varied as there are school districts," said Scott Knight, chief of Chaska's Police Department.