Some more variations I created based on @danielschweinert's NSFW door hangers.
The original artwork created by Alice Noir from Noun Project (https://thenounproject.com/browse/collection-icon/tantra-51063) was downloaded under the Basic license as SVGs, converted to JPEG format, then converted to STLs using https://imagetostl.com/. These were then pulled into AnkerMake Studio and trimmed to leave only the artwork.
I found that printing with a 0.16mm layer height and changing the filament color at layer 18 looks pretty good. I haven't test printed all of these models personally, so let me know if any turn out so poorly they prove to be a waste of filament and should be removed.
The author remixed this model.
Modified graphics using original Do Not Disturb as a baseline. Thickness resized to 4mm for durability and ease of printing. Resized in X-Y axis to fit a 50mm door knob. Artwork created by Alice Noir from Noun Project (CC BY 3.0).