I don't personally do this, but, my first reaction is that it is morally acceptable.

Here's why.

(1) Let's presuppose that the purpose of radar patrol is to curtail dangerous driving habits. Then, "flashing lights" helps achieve that purpose.

(2) "Flashing lights" seems to be an act of mercy. If we truly love our neighbors, then we don't want them to violate the law and suffer consequences. "Flasing lights" warns and reminds others. (By the way, my dirty little secret is that I don't flash lights because I want other drivers to get caught; how could I wish that on anyone?)

Perhaps, motive plays an important role. If you flash lights out of a desire to evade justice or prevent the police from doing thier job, then that does seem morally suspect.

Foster a Titus 2:1-6 kind of lifestyle for young people. Teach them to value older, godly Christians. For younger women, this means receiving instruction from more mature women, and for younger men, this means learning self-control from more mature men in the congregation.

I don't care how long you keep me in timeout; you will never pry this treasure from my hands!

Several years ago, when you searched my name on the web, you came up with "Jason Adkins Cemetery" in PA. Yes, that's sobering.

I want these words from Jesus on my tombstone: "I died, and behold I am alive forevermore" (Rev 1:18)