I don't think that's likely... Doug can't possibly drain the node under Megatokyo -- he's not going to empty out a world- (or universe-) sized node.
One odd idea I was thinking of for him was that since he leaks mana back out into the environment, he has a kind of "positive pressure" effect -- a mage trying to ground a fireball or something into him, say through the enchantment on his polykev, has a lot of trouble because the magic has to climb "upstream" to reach him, instead of the usual "downstream through the astral connection" mechanic.
-- Bob
---------
Then the horns kicked in...
...and my shoes began to squeak.
One odd idea I was thinking of for him was that since he leaks mana back out into the environment, he has a kind of "positive pressure" effect -- a mage trying to ground a fireball or something into him, say through the enchantment on his polykev, has a lot of trouble because the magic has to climb "upstream" to reach him, instead of the usual "downstream through the astral connection" mechanic.
-- Bob
---------
Then the horns kicked in...
...and my shoes began to squeak.