Just because we don't typically carry ourselves in that manner doesn't mean it's never warranted. It is totally reasonable to expect font data to remain constant, and totally reasonable for people to get mad when it's not. It's a reasonable expectation that this font data will remain constant, and it's totally unreasonable -- totally stupid -- for anyone to make a claim otherwise. Most people do not go shopping for a Google font expecting its attributes to change significantly at some random point in the future. Saying that versioning won't be implemented, that expecting the font data to remain constant is unreasonable, and to go use some other service if they're not happy with this surprise change... It is amateur hour. This "it's a free service" thing is a piss poor argument as well, because Google is hoovering up all your visitor data when serving those fonts. It's not free.