Collecting mugs, and that pen with a ruler, and the weird magnetic putty, and all sorts of exhibit gadgets, I appear to have given my participant contact details to the exhibitors. I am in all their mailing lists! The amount of promotional messages not yet classified as spam is staggering. I have spent all day unsubscribing from the various lists.
On top of that, we are getting a lot of shipments of free books and catalogs. Not all of them are suitable material, and sorting it out takes time and cannot be done by the untrained.
