As a general rule I avoid making cheap political points. You will have been aware of the embarrassment caused of late to the Liberal Democrats by virtue of the donation of £2.4 million made to the party by Michael Brown prior to the last General Election. A potential embarrassment of this nature happens to parties of all political persuasions from time to time. I have very little doubt that in coming years the Conservatives will accept a donation from (for instance) some alleged gangster/fraudster/paedophile porn merchant/person you shouldn't touch with a barge pole/dodgy geezer/Joe-who-you-are-not-allowed-to-take-money-from, where the most cursory enquiries (with the benefit of hindsight) should have rung alarm bells. I even have some vague recollection of some such Conservative faux pas in the not too distant past. Having said that, as the Liberal Democrats always seek to claim the moral high ground and should have known better, it is very very amusing.
Remember, when the Conservatives (or Labour) do make a similar gaffe again and the Liberal Democrats are full of righteous indignation, just refresh your memories with this article in The Times on 29th October 2005.