Convince them it is. Craig says:
The government is lobbying hard for my exclusion. I need everybody to send an email to firstname.lastname@example.org to urge that I should be allowed to give evidence. Just a one-liner would be fine. If you are able to add some comment on the import of my evidence, or indicate that you have heard me speak or read my work, that may help. Please copy your email to email@example.com.
Please also pass on this plea to anyone you can and urge them to act. Help from other bloggers in posting this appeal would be much appreciated.