I used to scan the cheques at home, pop them in an envelope and then stroll into town to make the single deposit of multiple cheques. My card would be in the machine for 30 seconds (the time when it's vulnerable to some vermin deciding to start on me). Now, I still scan the cheques at home (to retain hard copy) but need to have my card in the machine, exposed to villains, for a number of minutes while I slot in each cheque and verify it.
Very poor from a security point of view and awful for any irate queuers behind me.