[MENTION=27539]bbjore[/MENTION]; that is deliciously evil..  I may try something along those lines.  I think one time or another I mentioned they "passed" a check, but normally I just confused them.  As for the notes that's awesome.  I try not to include those as it often makes that player seem evil but you seem to have flipped that around.  I approve 
[MENTION=68954]Dan'L[/MENTION]; I love it when your playing and you see through the DM's plans.  Its nice to unravel something big and get the upper hand.  And I always make sure if one of my friends DM's to supply him with fun little mysteries to feed the group while I play 

  I just hint of course.
[MENTION=2]Piratecat[/MENTION]; That's a good idea as well!  With a good amount of guile that could really turn a party around and lead to some confusion.
[MENTION=71571]DracoSuave[/MENTION]; Agreed 
[MENTION=27897]Ryujin[/MENTION]; I'd say working on the fly like that is also great practice for the DM.  Lets him stretch and evolve his abilities. 
[MENTION=67954]moxcamel[/MENTION]; Well its when you seem most predictable you pull the switch card and reverse it.  After I did this once I did it again, of course they all thought I was full of it.  And then Ben was the saboteur; I've never seen them get knocked out cold that fast haha.  Silly adventures, thinking they've "got" the DM all figured out.
[MENTION=72670]Raunalyn[/MENTION]; I find DM's in that rut of anti-player hood need to calm down sometimes... Or get even.  For me one of my players (when I was still a green DM) used two scrolls of polymorph to I) change into a Balor, then II) a Balor with green eyes (so the timer reset to a minuscule change and therefore permanently).  Instead of getting mad as he'd done this before I had Asmodeus summon him to serve him forever in hell.  Then some games later I had Steven the Balor come and stir up some asswhoop ;P
[MENTION=83870]Kingreaper[/MENTION]; not with corn starch and red food colouring!  Add in a few drama classes and Orcus wouldn't even know!
[MENTION=76945]Thatwackyned[/MENTION], [MENTION=27897]Ryujin[/MENTION], [MENTION=6667124]ffy[/MENTION]; I'd have to agree, it would probably end in a little punishment.  Or eternal damnation 

  Or yes the complete shift of alignment and a warped view.  Maybe as a DM I'd suggest while that happened X kobolds appeared attacking your friends...  Only it was the Evil God empowering and tricking you to murder your friends.
[MENTION=72670]Raunalyn[/MENTION]; fair as well; there seems to be an abundance of DM's on power trips and it takes time to get a good one.  I remember once an old DM of mine just told me when I went to subdue a child I "tripped" and crushed him to death thereby forcing a town to hang me.  No roll, no reason, just for him to do and he said it was his right as DM to say how things went.