Erring is human. Correcting their own mistakes...  is almost divine.

Setting a sport climbing single pitch is not a game.

The places to search for adventure, shaky bolts, unsafe belays are the rock faces of the mountains: people who climb mountains know that they have to face danger.

Sport climbing, instead, is a game (not without risk, as any game), a sport.  

In Pale (a historical Umbrian climbing spot, that I revamped 10 years ago) I see so many climbers from all over Central Italy, rock climbing courses, students in visit: a world of new faces dealing with the shining and encouraging metallic hangers that I set not so long ago.

So, seeing a little boy (or a little girl) stretching out like a snake to clip the bolt, makes me immediately think of move upward or downward the anchors. In short, I always find some best way to place the anchors.

In these cases, I equip myself with a cordless drill (inevitably Chinese), a hammer, an expansion bolt,  and a wrench 17 make a difference. Then, on a day in where there is a friend willing to belay me for a half-hour, I finally get to do some improvements.

But then the old anchor still sticks on the rock. It doesn't look too good there.

Nut and hanger can be unscrewed. But the bolt remains stuck through the rock. Get it out is not completely impossible, but it's a real drag, which may result in additional aesthetic harms.

Therefore I firmly hammered the old bolt into its hole, until it gets entirely dipped in the rock (that's why I'm used to doing the hole 2-3 mm longer than the bolt). Then I spackled the hole with bolt dipped in, using a metallic plaster bought in an ordinary hardware store. It's a cylinder of the two-tone mixture. I cut off a slice of this mixture, with a little patience I work the dough with my fingers until the slice becomes a little grey ball, of the same colour as the rock.  Then  I spread the dough into and around the hole, until I have a well camouflaged gray patch on the rock surface, that after a few days will no longer be visible.