Not at all. It has taken over 6 months of selling to finally hit 175 sold which is how many people clicked on the poll wanting a shirt (and many people said they wanted multiple of a size and couldn't click extra times).
The only way I'd do it is via preorders, where everyone pays up front, I order exactly what is paid for, and nothing else.
If anyone missed out on a specific size, I'm sorry, but they've been available since last July/August.