just wondering if this would be a good idea,

if we could delete certain blog topics out of profile. so we dont have a big list of them

yes. this is needed.
i have a blog form a year back i want to delete but its still there

I agree, I have an old blog that is absolutely pointless that I want deleted. I don't understand why this isn't an option already.

i was thinking that though. why make them if u can delete them

yes but wont happen been suggested tons of times