There are plenty of free image hosting sites that don't want anything more than an e-mail address to create an account. I have posted as many pix as anyone on many different forums and have never paid a cent. The one I like best is Fotolode.com. The only contact I have ever had from them is the occasional notice that the site or service is being upgraded.
Well, OK, there was the time they canceled my account because I had uploaded some album artwork that they thought might be pornographic. But once I explained what they were looking at, it was all good and I was reinstated.