It would be great to be able to suspend/bypass blacklist entries rather than having to delete and then re-enter them if required again.
I believe that is a different feature than the user requests. Instead of disabling Pi-Hole entirely, the request appears to be to toggle individual blacklist entries on/off.
The intention here is to be able to click a checkbox or similar to toggle a blacklist item. Case in point would be to blacklist youtube etc until certain people do their schoolwork etc
Implemented in v5.0. Individual domains can be enabled/disabled.