In article ,
Richard J. wrote:
Are you suggesting that a senior manager of, say,
Metronet has given permission for graffiti to be applied to some of his
company's assets?

No. But I could believe that a London Borough would give permission
to tart up a railway bridge.

However, I'm picking nits in your posts; I suspect that we're all
agreed that vandalism (by which I mean unathorized, deliberate
damage, including by paint) is to be discouraged.

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