I reckon it makes perfect sense for Block Judges to exist. There was a nice piece on the subject in John Caliber's excellent Drokk City series:
Block Judges
Patrol Judges may be charged with bringing the law to
a chosen cityblock, a position they may hold for weeks,
months or even years. The Block Judge is granted a
unique opportunity to familiarise himself in great detail
with the sociology of cityblock life; he will become
an everyday part of the cityblock community, fostering
a healthy working relationship with the blockers, and
getting to know the block’s criminal fraternity and
their haunts (rotspots) intimately. Most cityblocks
will only have a single resident Judge; problem blocks
have sometimes been known to have as many as six
permanent Block Judges stationed on-site.
The Block Judge lives among the blockers in an
ordinary apartment (the blastproofed outer door is the
one single concession), connected by habputer to the
Block Committee, and can be summoned by citizens
wishing to report a crime through the same, or via the
block intercom when the Block Judge is out on patrol.
Once a week, he holds a ‘Block Court,’ pronouncing
judgement on citizens who come before him with
their grievances great and small. As unforgiving as
this work regime may appear, the successful Block
Judge learns to adapt to his circumstances, grabbing
sleep and scarce recreation time when he can get it;
needless to say, the turnover of Block Judges can be
quite high.