njmeanwhile saidI especially love when I comment in a forum answering someone's question, usually taking some time to formulate my thoughts or look something up for them, and they look at my profile but then don't PM me or even acknowledge what I said in the forum.
Yup. I have theory/explanation for this..
a) They will only acknowledge you if they think you're hot.
b) They are only looking for people to agree with them.
c) They are actually looking for responses from certain people, but are too afraid/shy to ask directly.
d) All of the above.