re: Removing and reconnecting a door

Nah, if they aren't stripped already and if you don't overtighten them going back they will be fine. Sometimes there will be an extra long screw for extra holding so keep track of which hole it came out of.

I guess its a super tight fit and you can't just take the pins out of the hinges? I would much rather do that than risk the minor damage to the mortises and paint that comes from unscrewing hinges. Close the door and tap up the pins. Slightly open the door and hold firmly to pull away.