If it's a server with clear laid out rules for everyone then people should be expected to obey them
and if they don't, then I run out of sympathy for said people when the host revokes their membership.
I'm fine with rules on servers so long as the host isn't hypocritical about it and obeys the same rules they give out to other people.
and only resorts to backup files if the damage is too complex to fix in a short amount of time. I don't believe a restore point is necessary simply because somebody's forest got cut down by somebody else without permission, saplings can restore that and nothing would be lost except time.
However if it is a case of stolen rare items (i.e stacks of diamonds) or lava on beds etc
or if your mansion or iron golem farm had been demolished by somebody else, then backup files aren't unreasonable to use IMHO.
I just don't feel that backup files and whitelists go far enough to protect against griefing.
We need log files to track user activity to determine who is responsible for the damage 100% of the time,
so we can avoid arbitrarily accusing people and banning suspects instead of someone who is directly to blame.
That is the biggest problem with non anarchy servers
you can't always know who did what and that is important information if you want a server with rules on it I think.