In 2009-ish my local US House rep had his bio edited from an office in the Capitol building. Repeatedly, in fact. I've always wondered it was done by him or an intern.
Based on the blisteringly dumb things he'd say in public, and the fact that he was one of the vanishingly small minority of Republicans to get redistricted out of his very safe seat in Ohio by his own party - I'm betting that he did it on his own time. Not that I think his "retirement" had anything to do with the Wikipedia bio. It's just something that would fit with his ideas of "having a cunning plan."