I believe that the Ranger trees are supposed to be safe, like the thieves sewers. It was changed for a while, then changed back. Apparently, the Rangers needed another good skill to facilitate running away.
On another note, stopping Ranger blowpipes is relatively easy, though little known. I will not post it here, but talk to me or Julian <wink> if thou art interested.
Sir Arthor, of the many bearskins.
Written by my hand on the 9th of Agamnion, in the year 999.