I've long thought Georgetown's weak spot lies in the groups of prospective students that tour campus several times a day. Anyone wanting anything from the administration could scare off these high school students with their complaints and horror stories until the administration relented.
I think we can apply the same logic to Morocco (it's worked in the past, with campaigns against apartheid South Africa). Tourism brings Morocco a lot of money each year, and anything that threatened its tourism revenues would merit the government's attention.
I can't think of any tactics now that could use tourism's importance to Morocco as leverage for Western Sahara, but they'd be immensely powerful. Let's talk it out. An obvious problem I see is that tourists to Morocco are harder to reach than, say, prospective Georgetown students.
Photo from Flickr user *hoodrat*