good idea pillz, T-shirt with rank. Head admin logo then, Head admin etc.
Maybe if you buy so and so many T-shirts you get a free ranking t-shirt.
Only possible issue is getting demoted, then the shirt wouldn't accurately represent the person anymore, it'd be false advertisement! So what that'd be like 5-15 HA/CL shirts, <5 coder shirts (I think), 20< Veteran shirts probably, then a standard Administrator shirt, and a basic rankless shirt.
Though, customizing a name for each shirt or whatever is more pricey I believe, depends on how yall are doing that.