Yes, I do, though the picture issue has as much to do with not having had time to wrestle with the hidden-9-layers-deep settings in a new version of vBulletin, as it does with security. But having just 5 minutes ago removed two newly registered users who were wannabe spammers, yes, security is always on my mind.
You probably should check out this site by a former PoolForum user:
http://www.howibuiltmyownpool.com/
If nothing else, it will give you a clear picture of how a really careful and systematic engineer might approach a DIY pool.
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