Here's a different suggestion: how about schools get enough civet security that her don't leak their students' information? Whether hackers can demand a ransom in crypto currency or not doesn't change that the school district made their students' personal information vulnerable.

If the school feels that they cannot handle cyber security at such a level then use a typewriter for students' personal information. Once this information gets out there it can't be unreleased.

Edit: I do concede that crypto currencies probably increased the amount of ransom attacks on systems. I also think that security in systems that don't contain any PII probably isn't as important and these attacks do affect them too.