Der Spiegel calls it a "prophylactic measure." Apparently they did this on Friday:
Now that anger is being expressed in an unusual way: An Italian group on the social networking Web site Facebook is urging people to post condoms to the pope in protest over his remarks. It expects 60,000 subscribers will send a condom to the Vatican on Friday.
The postal protest is "a peaceful provocation ... a reaction to the pope's absurd words on condoms," wrote the Italian organizers of the Facebook group, which now has more than 26,000 members. It said it represented young people "who are the closest and most interested in this kind of question."