No, I get almost no spam. I use a couple of excellent modifications. I try to keep mods limited because it's a pain to update to the latest versions of vB, which is a priority for me.
I value highly a secure setup. But, I also want to have things organized to make it easy and fun for my members and visitors to post. I actually have a large section for consumers that also do not have to register to post their questions. It helps for the drive-by DIYer and it also encourages more registrations because of our perceived leniency and hospitality to visitors.
As an aside, the latest entry on one of my blogs talks about forum organization. Maybe you will find it interesting - even humorous:
Forum Organization: A Site Review - what to watch out for when planning & building your site | enterpriseJM
Jim