I am part of the Fabric Moratorium thread on the QB which means I really really need to stop buying fabric BUT if (and when) I fall off the wagon I stand by that fall. No need to hide as my DH is fully supportive of my hobby. When I get something in the mail he usually gives me advanced warning that I have a "squishy" waiting. When those blessed catalogs come in he totally teases me with them. I think he wants to help me test my resolve.
Do I judge people who feel they have to hide things? Absolutely not. I just think it is sad.
Now I have known couples where there is good reason for not making ANY unnecessary purchases and then one of them will go and buy "stuff" just to upset the other. Whether it is fabric or clothes or electronics, don't spend what you don't have to spend.