The current MOTD states that during a Hide and Seek day CTs still have to be out of armory by 14:30. It used to be that CTs just wait in armory while Ts go hide and when we did this HnS worked. It was an effective, fun day, and very popular with both Ts and CTs.
However, since the "leave armory" rule has been enforced, HnS is broken. All the CTs are forced to be clumped up in one room while Ts, instead of running to hide, all run into armory, get guns, and slaughter them. There's no incentive and nothing forcing Ts to hide. It essentially turns into a freeday with all the CTs conveniently stuck in one location.
I have never seen one single HnS day successfully work when CTs don't wait in the armory.
Also, this is less vital, but I'd recommend allowing Ts to continue camping during last CT on HnS day. The entire point of HnS is that whoever has the best hiding spot should survive and get LR. However, with the last CT, all hiding Ts have to scatter and try to kill the last CT, defeating the purpose of the HnS day in the first place. It's kind of unfair that the Ts who chose a good hiding spot have to abandon it because CTs got killed by other rebels. It should be their choice to try and kill the last CT or to continue hiding and hope they're not found.