On the way to DD's riding lesson and our archery practice, I described the logo to DH – colon, opening bracket, colon, and underneath the word 'bipolar' – and asked him what he thought of it.
"That sounds like an effective logo."
Then I told him that some people thought it offensive. He was surprised by that.
I'm wondering now if the initial presentation had not been in the form of "light blue touch paper and stand back" (as someone described the OP), and if humour had not been mentioned, whether that would have made a difference to people's attitude towards the logo. I guess we'll never know now. At least, not on gransnet, though I suppose a experiment could be devised to find out among the uninitiated.