After this event, it could be reasonable to add such as a security feature to be able to detect "succubus attack". It seems reasonable they don't have a protocol to protect now, but after this it would be foolish not to. Especially as they know Deus is working with Tom, who could command Parfait.
On security: from what Dabbler said, it sounds like she'd be able to tell if this was the source and alert folk. Also someone entering the lust aura (as opposed to feeling it rapidly build) seems able to notice it as an external effect, as Max did.
No it wouldnt. The case being, its much more likely to be triggered by people being bored a friday evening, than from a genuine attack.
And secondary, from a succubus being extremely far down on the "likely source of attack" list.

As a bonus reason for why not. Then no. Tom is ABSOLUTELY not going to get Parfait anywhere near a potentially hostile situation.
She is the little sister of his girlfriend. He isnt going to make her take any risks.

Usually on a US government provided computer you are not allowed to access porn at all. If people are using their personal computers via government network, ditto.

So Leon should not be monitoring porn site usage because the firewalls ought to block that. If someone is getting past the firewalls, that *is* his business and he needs to figure out why.
Im to start pretty certain that dont apply to the military?
As else i would assume they quickly had a revolt on their hands.

There could be magical security solutions designed to detect not general horniness but rather the lust energy of a succubus Aura. Considering dabbler previously demonstrated that arc lights Willpower was insufficient
This is incorrect. We have not seen anything like this demonstrated by Dabbler.
She made an entrance early in the comic, where she instantly grasped the attention of everyone in the room. But it was natural for her to be the center of attention anyway.
As she were present to give expert testimony. And all it did was cause Max to yell at her to tone it down.

Vehemence showed how much of a security threat a sin Aura can be when wielded with intent
At that point Vehemence had gathered enough energy to solo all of Archon. (he would have won had he not spared Sydney)
Hence what he could do at peak power with his aura is unlikelyto be worth focusing on. If your fighting him like that you have bigger problems.

But the first one to succumb is the magic Apprentice. She's got enough control to lock her room down for privacy, but not to raise the alarm on an enemy tactic they've almost certainly discussed in private?
It seems quite likely Gwen isnt affected before anyone else. We just see her first.
And since she its after work hours she is likely off duty. Hence plausibly not finding it unlikely she suddenly gets in a mood.