A Similar problem near to me was cured by cementing a line of flints along
the top of the wall. Sounds odd but looked ok if the flints are chosen
carefully. All with round edges so you cannot be accused of cutting the
poor soft bottoms but they will be so uncomfortable they will not linger
then get out of the habit.

Best wishes,
Jeffery.
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"oo" wrote in message
...

Hi

I know people on these groups are full of ideas and are very resourceful.
I
have been looking for a solution to my problem on the net.

Basically youths won't stop sitting on my garden wall, despite my repeated
requests and threats they continue to sit there. Basically they are noisy
and wil eventually weaken the structure of the wall.