The only case of privilege checking I heard of that made sense
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There are other cases where it makes some kind of sense. One is dealing with Western activists who have an unhealthy attachment to "nonviolence" as a praxis in the context of someone else's struggle. There's one perspective on this from a Palestinian viewpoint here:
http://electronicintifada.net/content/how-obsession-nonviolence-harms-palestinian-cause/11482
In that case, most of the critiques of the "privilege" nomenclature actually describe its strengths. A good bludgeon is exactly what's needed, and about the best for which you can hope.
-- "Hige sceal þe heardra, heorte þe cenre, mod sceal þe mare, þe ure mægen lytlað."