Alex Salmond has accused No.10 of having "disrespected" the Scottish people.
Now, officially (and by that I mean since we started codifying the language), disrespect is a noun and can be used as an adjective or an adverb, but never a verb. Unless, that is, you're a hip-hop artist.
On the other hand, language evolves - that's how English became English.
On the 3rd hand, would one be downgraded if using the word in an English grammar exam?