Glitterpoop at Oakwood Valley

Watch out, Beardog! That's glitterpoop!

It makes me chuckle to think that there is a person out there who does this. He or she embarks on their regular hike at Oakwood Valley with a glitter dispenser and a keen eye for rogue dog poops. Those that catch his or her eye get a little sprinkle. 

I have only seen this here, on this particular Marin County trail, and I have seen it done for a few years. 

Is this:

1) A citizen's arrest of sorts, calling out irresponsible dog owners who don't tend their pets' excrement?

2) art/protest?

3)  another form of littering?

You decide.