Look at these boots.

To a new player, that could be a huge boost to their con. It's enticing if you are in their situation, and if you don't know about the downsides.
My suggestion: Make it so that if your con gear is removed while you're KO'd, your HP can not dip below zero. If your HP were to fall below zero, it should instead go to 1. This would allow players to still port home, and would open up con gildings to all players.
Sure, they could be bitten by a midge and die when they're back at their base, but what happens after they've ported home is on them at that point.
Con gildings are a noob trap and I've personally seen players die while being looted more than a handful of times this world and in previous worlds.