On the ‘plus’ side, there will be shorter lines at the confessional...
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Yes, they can seal those confessionals up completely, once they eliminate all sins. :-)
(However, we recently had a very liberal priest tell us that not recycling everything recyclable properly entails a sin that should be brought to the sacrament of confession, and I wouldn't be surprised if he also feels that opposing amnesty for illegal aliens is a sin also, though he hasn't expressed that yet. He may end up inventing a whole new batch of sins, and his own confession line might get long -- but I doubt it.)