First of all I'm not a spammer and also I have not steal your software.
As you know your product is released in GPLv2, according to GPL I'm allowed to sell, modify and redistribute your plugin. so if you will stop people from modifying and then harassing them, this would be considered GPL violation.
I could be wrong or may unintentionally I have infringe your copyright but please don't call me stealer or theft because I'm not those kind of people it is hurting my dignity.
Now what I need is pass this issue to WordPress so they can remove plus version if it is against there terms. I'm not updating Vb PLus unless this issue is resolved and also have removed it from other sites.
There are some features which I have developed I would happily give them to you so you can implement if they are worthy but only if I found guilty and in end Please again I'll request don't call me stealer there were no hidden agendas on my site.