2921.31     Obstructing official business.   
 (A)  No person, without privilege to do so and  with purpose to prevent, obstruct, or delay the performance by a public  official of any authorized act within the public official's official capacity,  shall do any act that hampers or impedes a public official in the performance  of the public official's lawful duties.   
    (B)  Whoever violates this section is guilty  of obstructing official business. Except as otherwise provided in this  division, obstructing official business is a misdemeanor of the second degree.  If a violation of this section creates a risk of physical harm to any person,  obstructing official business is a felony of the fifth degree.   
        Effective Date: 03-10-2000     
  You're assuming LEO's are idiots.   If they see you flying down the road, tag you and the gun comes back 65mph cecause your jammer gave you time to slow down,  yet they know well and good that you were going faster, they can still pull you over an ticket you.   No speed detection equipment is required under law.   Upon said ticket they absolutely will inspect your car for a lidar jammer and site you for obstruction if they find one.      Cops aren't stupid.  
Your day will be met in court.