"The only thing I am arguing against is the idea that it is intended to be abuse in the first place and is the prelude to an attack"
You are wrong. It is intended to be abuse, I repeat, no right-thinking man would ever say "nice titties love" to a woman he didn't know, who was out with her child. You obviously mix with low life if you think such behaviour can ever be considered normal and reasonable. It's irrelevant whether such behaviour is the prelude to an attack or not - the fact that it might be is the implicit threat and the one which makes the woman on the end of such a remark fearful of her safety, particularly if she is with her child at the time, which makes her doubly vulnerable.
"I knew these guys and knew they were not rapists or particularly evil so I can assure you that it is not intended to be hateful." One in four women is raped in her life. That's an awful lot of men doing the raping. The vast, vast, vast majority of it goes unreported. You wouldn't know if they were rapists or not. More to the point, the victims of their sexual harrassment (one in four of whom will have been or will be raped) would not know if they were rapists or not.
"If you want to start a compaign to make it known to all men that some women find it upsetting..." hello? where have you been for the last 40 years? For at least 40 years, women have been discussing openly, in the media, on the radio, TV, in magazines, newspapers and latterly on websites, how offensive and sometimes frightening they find this behaviour. How can any man in the country who has access to the media, not know this already? The point is, men who behave like this already know that women find this unacceptable and they are choosing to do it anyway for their own reasons which are usually to do with power and control. The building site incidents are slightly different, in that they are driven by peer group pressure and the pack mentality, so the most mysogynist and insecure (about women) men there, carry the rest of the pack along with them. But in the case of a lone man accosting a lone woman, that is a deliberately threatening act.