One proposal offered for an "incel" flag. The white bar at the center represents functional members of society who are effective at courtship and dating. The various shades of grey denote a spectrum within inceldom with each outward vertical bar representing an escalating degree of the incel status. The darkest shades of grey represent the ultimate incels, truecels; the lightest shades represent the least incel incels, nearcels.
SVG conversion of flag design at https://beyond-mogai-pride-flags.tumblr.com/post/148910576285/incel-flag and https://beyondlgbt.deviantart.com/art/Incel-flag-625774129
"Beyond MOGAI Pride Flags" Tumblr site came up with the abstract flag design (which is too simply geometric to be copyrightable).
Conversion to vector SVG by AnonMoos