I think what your doing will probably be saving people money. As you have pointed out there wil be people taking your source, renaming it and putting it up for sale. I think this type of software there would be a lot of people that would find the alternative first and pay for it.
It's weird I guess that charging for the software would get people off your back but giving it away for free draws this extra criticism rather than thanks.
I think the real problem you could face going open source, isn't just that someone will rip you off and sell it for money. It's that the person selling it for money can now afford to advertise and spam google, which means your free software is going to rock-bottom out of the search rankings and only a committed person will be able to find your free software.
Also I never got that bizarre entitlement that comes from free software users. I almost feel bad for asking about problems when it comes to free software, just because I know the effort that goes into it.
The amount of entitlement some people feel from the authors of free software is quite surprising.
It's twice as bad when those people are pirates. Honestly, I don't have a big problem with people pirating our software, especially when they probably can't afford it (young teens etc.) but they certainly don't deserve to get our time and support for free as well.
Stop right there. As a practical matter, you're misinterpreting comments. As a philosophical matter, there's no way you can know what others feel. This whole train of thought is ensuring that people misunderstand you and, worse, take you for the worst kind of sniveling martyr.
It's weird I guess that charging for the software would get people off your back but giving it away for free draws this extra criticism rather than thanks.