[MusicMan]

I think there was definitely meaning behind the BB9 eye, I heard someone on the show speaking about it (I forget who... maybe Davina, I'm not sure...)
But apparently the black is meant to represent peace and order, and the red splinter is meant to be war and chaos (or the other way round...!)
And the smashed effect --> sharp edges and points --> bad things! Simple geometric symbolism, as with BB5.
There were obviously links with the house design too as Patrick has mentioned, most noticeably with the wall design on the Hell side of the house (triangles), the kitchen (red and triangles), the garden walls (irregular shapes with harsh corners as opposed to rounded), and the frequent use of the red splinter motif, for example on the B-Block bedroom floor and on doors.
All things considered, and this is just for one series, I think the logos are a far cry from having no meaning. Whether the meaning behind it is more or less obvious - they wouldn't just have a random logo just because it looked 'nice'.