Squares
by keyz

Comment:
Obvious use of a tripod, or any other long-term stabilization tool (1-10 *is not the score of the shot though*): 10
Sharp rocks and lighthouse with misty/foggy waves. All telltale signs of a tripod.

Hey Diddle Diddle
by fd3rd

Comment:
Obvious use of a tripod, or any other long-term stabilization tool (1-10 *is not the score of the shot though*): 5
A good telephoto lens with a high ISO, handheld? It's possible. Star trails with the moon would have been a dead giveaway.

Evening Light, Evening Calm
by Bear_Music

Comment:
Obvious use of a tripod, or any other long-term stabilization tool (1-10 *is not the score of the shot though*): 2
There's nothing here that tells me that this couldn't have been shot handheld.

Tiny Rainbow Droplet
by IreneM

Comment:
Obvious use of a tripod, or any other long-term stabilization tool (1-10 *is not the score of the shot though*): 5
Although a tripod was likely used, doing this shot handheld with a couple of strong light sources could have been done as well.

X factor
by cutout

Comment:
Obvious use of a tripod, or any other long-term stabilization tool (1-10 *is not the score of the shot though*): 3
Without knowing what I'm looking at, it's very hard to tell if this is something that required a tripod to accomplish.

Playground of the Gulls
by glad2badad

Comment:
Obvious use of a tripod, or any other long-term stabilization tool (1-10 *is not the score of the shot though*): 3
If the exposure was lengthened to another second or two, the waves/water would have been more smooth. This just *feels* like a ~1/2sec exposure, something that could have been done handheld with steady hands/arms.

Red lines on Tower Bridge by night
by danieletagliabue

Comment:
Obvious use of a tripod, or any other long-term stabilization tool (1-10 *is not the score of the shot though*): 10
Light trails from bus and headlights from cars + sharp architectural surroundings shows a tripod was used.

Warmups
by GeneralE

Comment:
Obvious use of a tripod, or any other long-term stabilization tool (1-10 *is not the score of the shot though*): 2
Although a tripod is in the shot, one wasn't needed for the shot to turn out well. It could have been done handheld.

By the Light, of the Silvery Moon
by PenelopeK

Comment:
Obvious use of a tripod, or any other long-term stabilization tool (1-10 *is not the score of the shot though*): 10
Star trails and misty waves shows beyond a doubt a tripod was used.

The Blur of Modernity
by jagar

Comment:
Obvious use of a tripod, or any other long-term stabilization tool (1-10 *is not the score of the shot though*): 10
Very sharp architectural surroundings + car/human movement shows this exposure went beyond a tight handheld limit.