which does seem a potential problem.
Labour to refer Falkirk selection row to police
The Labour Party is to refer a report into allegations of irregularities in the selection of an election candidate in Falkirk to the police.
Labour leader Ed Miliband has said an internal inquiry into events show people were being signed up to the party without their knowledge.
...
He said the party's inquiry had shown "people were being signed up as members of the Labour Party without their knowledge, it says that bad practices were going on, it says people were being asked to sign up to the Labour Party on the condition that they supported particular candidates. We are not having this in the Labour Party."
...
But in a letter to Labour's general secretary, Mr McCluskey said the union had "nothing whatsoever to do" with the alleged attempt to sign 100 or more members to the constituency party without their knowledge.
http://www.bbc.co.uk/news/uk-politics-23192888