Being able to do so would help pass the time while doing an activity like mining... not that it takes very long, just saying I don't see any reason to disable being able to click on certain items. I noticed I can click on my familiar rock while mining, or click on the game time/date/day and the information will come up. Why am I not able then to click on other players?
Also, I think I should be able to rearrange the items in my bags while doing an activity (again like mining). I can understand not being able to activate the items, but to be able to do a few seconds of rearranging while mining would be swell. Super swell.