Timing might be everything. Before the game, during breaks between quarters and at half-time would be fine with me. It wouldn't show disrespect, nobody would confuse it with Carl Landry (seriously?!) and it does get a message across that I think the fans have a right to voice and the front office needs to hear.
Remember, it was fairly well acknowledged back in the day that the reason we didn't end up with Whisenant as a head coach was because the fan base, including a big push by Kingsfans.com, made it clear he wasn't what we wanted in a coach.
You never know what might happen until you try. Kings fans have always been vocal, they've always left no room for doubt on where they stand. I don't have a problem with a "WE WANT KARL" campaign - and I don't think it will hurt Corbin's feelings. I'm pretty sure he already knows how the majority of the fanbase seems to feel.