As Macado said I have had an aggressive meeting with one in Cozumel.
3 people in our group had spears and one had just gotten a lionfish and fed it to a waiting scavenger.
Moments later the shark showed up and repeated rammed the 3 of us who had spears and ignored the rest of the divers entirely.
Thinking back... I think I was using Macado's spear that day so it must be his fault.
That nurse shark is notorious for being like that and at the same site. Its his site.