You're worried about copyright issues over a paper that YOU wrote? Submit it to Arxiv.org, they don't seem to have a problem with copyright issues.
As Jed noted, authors have to sign copyright agreements with journals. In my case, it is a non-standard one as I technically work for the government. The articles are printed in journals that sell subscriptions. My releasing a paper to a free distribution site such as Jed's seems to me to circumvent what the journal is trying to do. I do have some leeway in sending copies to individuals. I believe that is part of the 'fair use' idea.
Where came the fault, is when you don't correct, don't answer, don't even try.
Or when you misrepresent, and pass it off as definitive...