xEpikNinja

Simply because people may not want to timewarp when others do, causing problems in the server with people crashing. Or if a vote is used, people may not vote also leading to problems. People wouldn't play multiplayer if others decided when to timewarp, possibly ruining your work.

This looks like a good idea. I think you should add a global time for people to allow each other to sync up their times with each other. Or simply just add a button to sync your time up with someones. An idea would be to only allow you to do this when you aren't moving (meaning you've landed or are playing as a Kerbal) so there would be no chance of this killing you through collision, or only allowing you to when you have a safe orbit so you wouldn't crash either. You could also only allow this sync option when in the space center. This mainly seems possible for syncing forwards in time (like a normal timewarp), but I don't see why you couldn't allow people to sync their times backwards to someone in a earlier time. You should also add an indicator showing who's in the same synced time as you yo make things easier.