Drywalling garage ceiling: joist hangers protruding

I am going to put drywall and insulation on a garage stall which was added to an existing garage. The ceiling has trusses on the inside half and half-width joists at 90 to the last truss which is beefier. The problem is that some of the joist hangers protrude under the truss almost 1/4".

The question is how forgiving is the sheet rock with this? Do I need furring strips?