Client side only! Do not install on the server!
This mod will disable custom skins of players when installed. It was made with the primary use of easily taking screenshots for the FTB Wiki, as per the image uploading guidelines, but I suppose it could be useful for other people as well.
Note: This mod is a core mod.
Wow!, is there a 1.8 version please?
Wouldn't it be possible to just change the skin texture directly, rather than using ASM? This could easily be done in the same way I change elytra textures in bookshelf. I actually have the code for specifically changing player textures in bookshelf as well. You can find it here. It uses ATs rather than ASM.
What about adding a white/blacklist?
For players or whole servers.