No, of course I am not suggesting it should be officially banned.
Nor am I bothered by all the other endearments people through about, any thing from 'pet', 'sweetheart', 'princess', 'luvvy' and all the others posters have mentioned, not even being calle a 'guy'. These are all words used at random with no particular purpose.
What bothers me about 'Ah (aw) bless', is the tone in which it is usually said and the situations it is used in. It seems to be always said in a downwards tone that goes with talking down to people. When a baby or toddler does something sweet, an onlooker will look at it and say 'Ah, bless'. When a dog runs to greet its owner, the response of an onlooker will again be 'Ah, bless - and if you are elderly and the person you are talking to, thinks your comments or request or symptoms are not worth taking notice of (because you are old), they will look at you, smile and say 'Ah bless'.
This was the distinct impression I got when I saw our nurse practioner, I was dismissed with a trivial diagnosis and no help with a minor but chronic problem and ''Ah, blesses' all the way through the consultation. A year later I saw a doctor, who sent me for an xray, gave me prescription of antibiotics, that finally cleared the chronic minor infection I had, and another prescription (not antibiotics) that I can renew everytime the problem comes back - and a considerable improvement in my quality of life!