After reading the description as to why Arolte got stuck in 10, (sector crash) i was wondering.. Wouldn't it be possible to make the server ignore the packets it doesn't understand?

The problem is the server didn't decipher the packet. It just sent the packet on to the seector. The sector needs to ignore the packet if it has any invalid data in it, but the problem is that the data may be invalid for different reasons.
The sector actually wasn't checking for truncated packets or didn't decode the packet properly or the player didn't encode it properly or something. We added a check to try to prevent that specific thing from happening again, but there are many other places that will need to be fixed to work with the check properly.