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That's a good idea! Can never be too careful on the 'net.
Too late now, but I'll take another photo and replace the image in the morning.

Here you go. I guess I don't usually sign because they're usually just sketches I'm doing in a book, not finished artworks that I'm going to sell or display.
20171020_171435.jpg
It is important to think about, though. Admittedly, I often don't vote for posts that are just a picture or a video with little explanation and nothing to show that the person posting created the work. Good pickup.