Unique Names

I started this blog off, using the Sobriquet 'Blog Bloke'.

I was asked by the "original Blog Bloke" to not use that name, as he apparently has it "trade marked".

OK. I've happily changed my monicker; no sweat ...BUT is there a point in restricting unique usage? I mean, we all have our given names, registered at birth ...but we are rarely the sole user of that name. I'm happy to be enlightened!