No, nor is it necessarily a bad thing for politicians to monitor and even edit the Wiki, even their own pages. But, it is interesting to watch, and it definitely isn't appropriate for a politician or their staff to vandalize the Wiki pages of political rivals, or manipulate Wiki pages to advance a political message they're trying to sell.
Vandalism is vandalism, regardless where it comes from. There should be no need to discriminate editors on the basis of their profession or IP. Only the nature of their edits should matter.
