I might have an opinion...
There are a number of cholate beers available in the UK, a large number of which, probably the majority are not sweet.
cocoa, naturally a bitter flavour, fits well with hops in a dark malty beer. I agree completely that packaging it in similar packaging as a product aimed at children is not smart.
While possibly in danger the advertising iceberg, Plum Porter is an excellent beer for those that prefer sweet dark beers.
The same brewery produces a Cappuccino Stout that is served best with a shake from the cocoa shaker typically used on Cappuccinos.
Don't knock it before you try it!