http://en.wiktionary.org/wiki/rapio
EDIT: For a further stack trace, consider "enrapture", derived from "rapture", itself derived from the future form of "rapio": http://en.wiktionary.org/wiki/rapture .
And people say that a classical education and liberal arts is useless. :)
I get your point, though, but it was clearly generated by a computer, as are all the other shirts in that companies "KEEP CALM AND ______ ON" line. Most of them don't make any sense whatsoever.
The computer doesn't "mean" any particular use of the word, because it's a computer, and couldn't tell the contextual difference between "rape" and "yell" or "run".
The fault here is a poorly (or not at all) checked pool of words, and no human interaction between "generate slogan" and "submit to Amazon"
The dictionary gives 3 examples of rape in a non-sexual context. Again, know that I am not saying the t-shirt was not offensive or in bad taste generally, I certainly would never buy it or wear it if given to me (no one I know would give it to me).
At the same time, in a hypothetical where an automated Google car hit someone, would it make sense to yell and the Google car and say watch where you are going? See in this exagerated example, it becomes clear I am soliciting insight to human interaction to an automated system that did not have intent.