It's all well and good to wave the newbie/casual/fuckwit friendly flag around but there's no escaping the fact that if you're even remotely successful at anything in Eve, you will have something to protect. In order to protect it, you'd damn well better keep corp security in mind. And yes, casual is a negative thing whenever you try to achieve something beyond mediocrity. Sure, it goes closer towards the elitist jerk side of the spectrum, but frankly that is not a bad thing for a lot of people. Hell, even information is worth protecting. When wardeccing corps, one of the first things I do is finding the newbie character who's recently joined (and is thus less likely to be very loyal) and wave a decent amount of ISK in front of him, then just wait for the torrent of info from corp forums and elsewhere, not to mention real-time reports of corp operations he might know of.
In all my time in Eve that has rarely failed. The casuals and newbies are the weakest links in any corp they're in, unless they're alts.
Even if they are casuals, if they can't be bothered filling out a simple fucking application and go through some fairly simple checks and routines (limited APIs, interviews etc...) they're not fucking worth having anyway.