You can make one video of all the hackers, then use the video for each report.
Minecraft PC IP: play.cubecraft.net
CubeCraft Games
TriangleAttack
CyberAutumn
Actually, it wasn't hacking. The three were being extremely inappropriate in the chat, all saying things that were beyond acceptable for the server.
TriangleAttack
I guess you could do the same with one screenshot, just in all separate reports.