My group always helps the bigger zergs during Scroll runs and I can honestly tell you - I've never picked up one during a run or a drop. In the 3 years of playing this game I've never been interested enough to attempt it because some people get so mad that they'll abandon the runner so he/she dies and they can get it.

So my question is this - just for giggles - if I go to a keep holding a Scroll (say Alessia) and I have the option to pick it up (it's a Scroll we took and are holding). Can I grab it and put it back or do I have to move it somewhere else because I picked it up?