Need some additional input from research hounds for this one, there were so few Donal's BPs running around across all the servers during this time period (Kunark release -> uber nerf in Velious) that anecdotes are few and far between, plus the fact even fewer people would have something better to wear in place of Donal's BP (i.e. Robe of the Azure Sky or Withered Leather for resist).
Posting this for additional discussion, input, and research.
Issue: Donal's Chestplate of Mourning is currently capable of being activated from inventory without having to be worn. My research indicates that this was a rather recent addition to most Trakanon BPs of being "any slot/can equip" rather than "must equip".
Potential Fix: Remove "any slot/can equip" replace with "must equip", pending outcome of research.
Dec. 2007, first and last archive indicating "must equip" from Zam, the previous entries did not have the classification of "can equip/must equip" distinctions:
http://web.archive.org/web/200712050...html?item=2061
Dec. 2012, Archive of Donal's BP from Zam:
http://web.archive.org/web/201212270...html?item=2061
"Any slot/can equip"
April 2013 Today's Zam:
http://everquest.allakhazam.com/db/item.html?item=2061
"Any slot/can equip"
Further examples:
Blood Ember BP -> "Must Equip"
May 2007
http://web.archive.org/web/200705021...html?item=2060
Dec 2012 -> "Any slot/can equip"
http://web.archive.org/web/201212200...html?item=2060
Present day -> "Any slot/can equip"
http://everquest.allakhazam.com/db/item.html?item=2060
Mrylokar's BP -> "Must Equip"
April 2008
http://web.archive.org/web/200804020...html?item=2055
Present day -> "any slot/can equip"
http://everquest.allakhazam.com/db/item.html?item=2055