Member - I'd probably just go on like nothing ever happened, I'd still message them and congratulate said person, and then I'd go back to not paying attention to them like I likely did before since I hated them. I'd keep posting in the area though, because if I wanted to be modded then I'd still have hope. Just because they were modded this time, doesn't mean there won't be another chance.
H-staff - I have no one that I hate, nor do I have anyone whom I'd hate to see in an area - within reason anyhoo. XD For example, if someone wanted to take someone who was fit for NU/W, and wanted to mod there, but other staffers wanted to mod them in / gave them ROM Hacking and Emuation, then I'd have to shank some people. I guess that wouldn't be hating that person rather than the decision..
But um, if someone that I hated were put into a section that I really loved, then I'm sure I would've voted against them if I really disagreed that they'd do poorly in the area. At the same time, if they were an awesome fit for that area then I'd wish them luck whether I hated them or not. I wouldn't bother being buddy-buddy with them I can't imagine, but I wouldn't stop posting there, I'd just avoid them unless I had to talk with them about staff matters. Eventually I might even get to know them, and would change my opinion. -shrug- It's wide open with me, because I try to get along with most people, and not hold grudges.