How much trouble would I get in for doing this?

[CompactTractorFan]

Some states you can get a ticket for using the SMV sign on either something faster than 25mph or something stationary.

I see them a lot on mailboxes...

 

[TripleR]

I believe a flag is mandated as it tends to attract attention while waving about whereas a stationary object will not.

In Missouri a SMV is to be used only for its intended purposes and not for long lengths or to mark driveways.

 

[FTG-05]

This is what I'm looking for, I think (in addition to a flag or two):

From here: http://www.awdirect.com/cone-sign-blank-orange-reflective-4361b2o2/safety-cones-traffic-cones/

 

[tcartwri]

You are not even allowed to have a slow moving sign visible on equipment you are floating. So if you have your tractor on a trailer, the sign must be covered or removed. Although I have only been stopped once for this in a decade.

 

[DJ54]

How about fashoning a similar sign, but use Scotchlite tape on it. There are many different designs on said tape anymore... For night time, maybe a LED lightbar. And as for a reminder that it is back there, maybe a set of the lighted guide bars you see on front bumpers of semi's. They do make shorter ones for pickup's.

 

[deereman75]

What about taking a piece of angle iron and mounting it on the back of the rig and putting a square piece of sheet metal covered in orange duct tape in the middle, and put a flag on each end of the angle iron.