One sets a bad precedent and involves lawyers.So, assuming the mural was benign, if Disney brass were so paranoid about their property being infringed upon, they could take about five minutes and draw up a contract in which the school would pay $1 for a 99-year lease on Mickey's image for the mural.
Or, they could be predatory jerks and sue. Six of one, half dozen of another...![]()
Sending a C/D is five minutes and protects their property and doesn't invite more infringement.