I have also downvoted myself before for getting too high rewards for a pic lol. You're right, better to discuss. It's just some of us have been downvoting a lot so it's hard to explain to everyone (but we already have a post to explain like this one). Hopefully "communities" feature on steem will help in the future to set expectation on guidelines. Have a good day too (No worries, I just can't read chinese).