Backpack spam, gold spam, it's all juvenile behavior anyway. Grow up people, MOST of us are supposedly adults. Act like it!
If I remember right, gold spam was deemed a form of player harassment back in the day. Not sure if Backpack spam was included in this, but I do know that both were the stimulus for the preferences portion of our character settings (All, Aliies and guild mates, Nobody)... Unfortunately, these preferences cannot be changed if a player is long gone from FS, and folks that spam these inactives for whatever reason cause nothing but problems for everyone.
Since most guilds do indeed use inactives for pack mules to defer the high cost of store slots (or because store slots have long been maxed) it's obvious to me that Guild Store purchases seriously needs to be addressed. Costs need to be lowered and the cap should be raised. Otherwise this problem will continue with no end to the debate.