I certainly hope you don't ever, ever worry about this. From what I saw of the posts, there were a few complainers, and far more people who would like to see your email.
I do not, and never will consider an email that describes a professional conference spam.
pf
>>And now the folks that put on the conference are all worried ...
>
>What -- me worry??<g>
(On an infant's shirt): Already smarter than Bush