Just passing thru I hope u don't mind me commenting on a couple of your points. (There's some good points there.)

Personally I wouldn't want to be giving too much away about myself if I had suspicions about that person. eg: If I initiated the contact but that person turned out to be the scum of the earth, I certainly wouldn't want them to be able to identify my isp/personal contact details.

3) I can see if his connection/resources are worth offering it to him
The idea of knowing a person's connection brings in a certain prejudice - oh they only have a dialup, so I won't offer them anything. It sort of brings in the upper bandwith 'class' & 'the others' not worth sharing with. Which is not to say it can't already be done b/c it can.