This touches somewhat on Mari-Lou A's recent post referring to tiny edits.
I often see teeny-tiny edits, where a word or phrase was italicized, while ignoring rip-roarers. I prefer more rather than less to follow rules. If the edit option states make it substantial, I'll edit everything that needs it: capitals, spacing, grammar mistakes that don't include the example, etc. It will usually come off as an intelligible question with a flaw-filled example. Most people have been gracious about the edit, just as I am grateful to people who edit out my stupid mistakes.
I looked through meta and didn't find a definitive answer to my question: should we polish the English of our OPs? If so, to what degree (it must not invalidate or answer the question, obviously)?
Edited to add: some of my own posts have been edited. I'm grateful for the folks who correct my stupid mistakes. However, once I actually had a user (you know who you are) who edited a slightly amusing comment out of my post explaining (he) felt grumpy today. I didn't know what a roll back was at the time.
Is this kosher? How much is too much, how much not enough? I have long since given up saying "thanks", or "hope this helps" in my posts. I know it's fine to remove those from OP's posts, but there is usually more to do. My question is: what's going too far (not including changing meaning).