The drawback there is that the opponent can switch out and then after the new Pokemon enters, Bide will fail.  You're just giving your opponent free turns.
 
I have just started running a Snatch Dusclops on my new UU stall team.  Everyone thinks he is set-up bait.  I added him to my team after I was swept by a Bellyzard... I can't wait to face another one (lol Shadow Sneak sweep?).
 
Does anyone know if Snatch will still work if the opponent has a Substitute up?  I realize I can Snatch their Sub in the first place, but there will be times when I have to switch in on the turn they use Substitute.  Also, If I Snatch a Belly Drum, is my health cut 50%, or do I only Snatch the positive effects of the move (in this case, +6 atk)?
 
Thanks.