@Great Argus They have been in the hall for a year now and i haven't heard of any issues. Unlike the wrinkled hornbills which have been kept here, those did harass other birds and ate slightly too many other inhabitants....
If anything they would be in competition with the large imperial pigeons (green & pinon), as they share the same canopy layer in the hall. But I have never even seen them in the same tree and the vultures in general stick to one corner of the hall, where the pigeons never really ventured.