[DogByte6RER]

It's S.F. ... so it's probably someone's "toy"

[PGR88]

Its performance art

[cripplecreek]

Addy

[Thank You Rush]

Weird looking spikes but then why would anyone from SF know the difference between a spike and a screw? “no pun”

[JDoutrider]

Having worked a decade in ER’s in the area, you may be right!

You would never believe the things we found “inserted”!

LOL!

[ransomnote]

Weapons cache? Chained with lock - maybe Black Lives Matter creeps have keys to the locks for these. Perps wouldn’t be stopped for carrying a “weapon” but could access them?

[CGASMIA68]

Mad Max

[shortstop]

Spiked bats in San Francisco? Gotta be Barry Bonds.

[TomGuy]

Someone is arming an escape route for when the zombie apocalypse hits.

[dfwgator]

[soycd]

These are not the bats you are looking for ...

https://www.youtube.com/watch?v=ecmYLI3_Jt8

[Cyman]

Nothing sinister it is just UberAnalBat , a new startup targeting kink friendly communities.

[a fool in paradise]

Spiked clubs are among the sorts of improvised weapons you’ll find in merry old England where you can’t get a gun.

[Sirius Lee]

A board with a nail in it works, too.

[fruser1]

Will a dog pee on a pole with a spiked club attached to it?

[bakeneko]

Head mounting for when ISIS clears out the homos in their next attack.

Oh that’s silly. They are ISIS’ best allies in this country.

[fwdude]

Perhaps one of their “liberated” street fairs just concluded, and they left a few of their wares?