Well, this was bound to crop up eventually, wasn't it

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"Official" NWN 1 ALFA never implemented weapon proficiencies for the war domain.
However, since ayergo's Waterdeep is basically not subject to ALFA's ruleset at this point but his private hobby project, albeit based on ALFA resources, you should probably talk to him whether he wants to implement some sort of exception / policy (or not). For fairness' sake, I should probably point out that current IA and PA (and all admin, really) might be apt to look at things differently where community rules of conduct are concerned - i.e. if somebody thinks harassment or what not is okay "there", they might still face repercussions "here".
Or to put that in more friendly terms: Ayergo has, as far as I am aware, the Admins' full support for offering game using old ALFA resources under the ALFA umbrella, and we strongly encourage members not to cause him headaches but be respectful of the fun environment he offers.
Now, back on topic, while I think war mattocks equally cool (used one myself in TOR, hah), I'd probably advise him to keep things simple and manageable.
Cheers,