I can't count the number of times I've been asked to relicense a piece of GPL software I maintain because users think it's "fair use" of the original source I built it from.

Sorry, even if I agree with you, the lawyers for the owners that have proven to be litigious in the past aren't going to stop and consider that line of thought when it's up to a judge and/or jury to decide that and I can't afford the legal bill.