i guess if you REALLY want to do it, here is what i found with a quick Google search. Please, realize that i DO NOT condone these actions haha
Yasutomo FabricMate Markers : These markers come in exciting colors. All colors mix well together. Draw or write on cloth as easily as you do on paper. No mess, no cleanup, pigment fabric dye is permanent after drying, and heat setting is not required. Brush tip markers are non-toxic, conforms with ASD4236. Fine art color set contains black, alizarin crimson, cobalt blue, viridian, yellow ochre and portrait pink.