How do you feel about adding a quick report command to the chat (key y)?
It could look something like this:
/rep (ID) (Reason)
So you don't always have to spend hours looking for a player in the player list, but can report him quickly.
The Input (Reason) could be used with either shortcuts (e.g. reckless for reckless driving, wrong for Wrong way....) or numbering (e.g. 01 for reckless driving, 02 for Wrong Way, 03 for Ramming....)