Semi-unpopular opinion go;

I used to care about things being edited without permission, though I stopped caring, since the original still exists. Somewhat unrelated, I don't even get why some artists make a big deal about their uncontroversial art being reposted (if they give credit), you're basically getting free publicity. It's the picture equivalent of word-of-mouth.

In the case of taking someones physical work and changing it without their permission, I could understand. Once that is changed, it is hard to go back and may be out of the original artists intentions. Or in the case of taking food without asking, may be for someone else/an occasion and once you eat it, it's gone.

And, what SE said in skype:
"Besides, you just posted it in the same thread as he. I don't get the problem, it's not like you modified it without his *knowledge*, you're telling him you did and he is to decide whether he's going to accept your version or not. So you're asking him for permission, except better because he doesn't have to trust you will modify it well, he can already see the result."

I'd be pretty greatful if people edited my work for good intentions (it's something I sunconsciously expect, compliments barely effect me unless it's a comparision of said previous works of mine). Don't be afraid to admit if there's something I need to work on (and it helps to explain how to improve it and why it's wrong).