Science publishing is very lucrative. These days, many of us are also faced with the necessity to publish in open-access journals, and have to seek special grants in order to be able to pay their fees.
Corollated with this development is the development of predatory open-access journals. There are many stories told about predatory journals, and their practices. Here is, by the way, a list of at least some of them:
http://scholarlyoa.com/publishers/
Have you been harassed by one such publisher, and what has been your experience?