Re: The price of being bored
"The problem with getting the police involved is the possible arrest record, because that doesn't get erased even if it was unjustified. "
Even without an arrest it is possible that it will end up as "soft intelligence" in the records.
Does the England & Wales terrorist law Section 44 (right number?) still apply - whereby fixed public areas can be designated and then you can be arrested without suspicion? It got some bad press on inappropriate use - especially against demonstrators. IIRC a guy doing nothing overtly suspicious was arrested in a public place like that - and then his house searched on the strength of the arrest.