If it becomes too much work for a single person then you just find a second person. When that becomes too much you can find an entire team of people, all contacted by a single email address. This is how customer support is done.

Everybody is more satisfied this way, users get quick feedback that their problem is being looked at, developers get enough information put into the bug tracker to be useful in fixing the issue and the number of useless bugs to wade through goes down immensely.