No way to enable or disable viewing of individual task list
There is no way to enable or disable individual task list of any account type (local or web - Google etc.).
That would be a nice feature. Also, because Endeavour and Evolution have the same backend (if I remember correctly), it is possible to disable display of task list in Evolution - it also disappears in Endeavour. Then there is no way to enable it back again in Endeavour (has to be enabled in Evolution).