Save the boolean switch to a global context variable. Then in all flows you wish to disable/able you can add a switch node and set the property to the global variable, then in the rule you can add the value you wish to allow the msg to pass.
e.g.
[{"id":"907cc07528150308","type":"inject","z":"30306197ead446be","name":"input boolen true","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"true","payloadType":"bool","x":140,"y":640,"wires":[["0d7c543b3b8f4e67"]]},{"id":"0d7c543b3b8f4e67","type":"change","z":"30306197ead446be","name":"","rules":[{"t":"set","p":"boolean_pass","pt":"global","to":"payload","tot":"msg"}],"action":"","property":"","from":"","to":"","reg":false,"x":410,"y":660,"wires":[[]]},{"id":"e5b30c75d3526748","type":"inject","z":"30306197ead446be","name":"input boolen false","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"false","payloadType":"bool","x":150,"y":680,"wires":[["0d7c543b3b8f4e67"]]},{"id":"ca358979c0a6c31f","type":"inject","z":"30306197ead446be","name":"flow","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"","payloadType":"date","x":130,"y":880,"wires":[["7263449e6eb9a0be"]]},{"id":"7263449e6eb9a0be","type":"switch","z":"30306197ead446be","name":"","property":"boolean_pass","propertyType":"global","rules":[{"t":"true"}],"checkall":"true","repair":false,"outputs":1,"x":270,"y":880,"wires":[["24ca65c4d8110e07"]]},{"id":"24ca65c4d8110e07","type":"debug","z":"30306197ead446be","name":"debug 226","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","statusVal":"","statusType":"auto","x":410,"y":880,"wires":[]}]
