There are obvious genuine reasons for not wanting to verify ...
Projects/businesses seeking funding for activities which are legally untested (or outright illegal) in the country of operation - remember Bitcoin itself falls into that category in many - e.g. now almost certainly Ethopia - http://allafrica.com/stories/201206180068.html
One of the main reasons I am involved with Bitcoin is to ensure that the capital of everyone (not just the banksters, oligarchs, dictators ...) is able to flow freely - I would almost certainly withdraw my support of GLBSE should any such move be made.
I fully understand why GLBSE provides the optional service of verification for asset owners and actively encourage it - it is an essential means of maximising investor confidence and should be viewed by asset owners are a superb differentiator, however, it should never be made mandatory.
Is it time to start denying listings for people without verifiction ?