More seriously: We can't edit the tags for the items in the shop. They are added automatically when the mod is compiled. An option would be to edit the website code for each item but it probably have to be done every patch because the compiler could erase all the modifications. The other solution can be to edit the compiler itself but we can forget this option because the actual team can't edit him, only chadz or cmp can do this and I doubt that they want to wast their time for this.
tl;dr: Impossible to do.