Rotter

On the Today programme this morning a chap called Jim Bennett was described as "an expert in child poverty". What does he do? Go round pinching their pocket money?
If so, we have had quite a few experts in child poverty at the local comp. Actually, they used to rip off other kids' dinner money so perhaps they were "experts in child nutrition". There's a bunch at the moment who spend their lunchtimes running en mass through the local shops, confusing the traders and nicking as much as they can, despite a rule confining them to the school grounds at lunchtime. Perhaps these are experts in economics.
One of the kids was recently suspended for making a recording, on his mobile, of a classmate having an epiletic fit. What would you call a bastard like that?