As I write elsewhere, this is a fundamentally flawed mindset. A high quality bug report is the reader's compensation. It's a goddamned gift. The presumption that the reporter is a leech and the recipient is the one being leeched is exactly what's wrong in the culture.
Consider this: You post your project. I'm not in the target demographic. But because I come from the culture epitomized in Shirky's Here Comes Everybody, and not the fucked up culture of the GitHub generation, where 999 times out of 10 you only reach out to someone because you're trying to get something from them, I decide take the time and give it a look anyway. Going into this, I already have nothing to gain. So I do look at it, and I spot a bug. I file a bug report with steps to reproduce. This is a contribution to the project, its maintainer, and whoever uses it. Do something with it, or don't. But no matter how you respond, I will get nothing out of it. To flip things around in a Costanza-like attempt to grab the upper hand is... anti-social.
This isn't to say that leeches don't exist. But muggers also exist. And yet, the fact that muggers exist is not a good reason to go around socking people in the mouth when they approach you and start speaking.