#1. "RE: shark stick questions" In response to Reply # 0
Do a forum search on "shark stick" or "sharky stick". There have been many good posts describing how to make one. Here are some basic ideas:
1. Cut a length of electrical conduit (1 1/4" or so diameter). Put a bolt through one end to hook on to signs.
2. Get an extensible painters pole. Using a 3" metal "T" brace, wire and epoxy a box cutter to the end.
For a bike? I wonder if a length of heavy duty chain would allow you to whap a sign down. Or, make an extensible shark stick and cut it down to a manageable size. You could use pipe clamps to attach a tube of some sort (PVC?) vertically to the frame, then slide the shark stick into the tube.