Disrespect for the Precious Blood

Local action as appropriate: this is a very serious liturgical abuse, affecting the Precious Blood of Our Lord. Despite the clear ruling from the Vatican (below), this still happens in many places where there are a large number of communicants, such as Cathedrals. If it is not practical to consecrate enough wine for everyone to receive under both kinds, without behaving like a lot of second-rate caterers, then communion should not be given under both kinds. The picture shows Mass being said by Bishop Brown of Orange County, California. Hat-tip to Fr Finnigan.
However, the pouring of the Blood of Christ after the consecration from one vessel to another is completely to be avoided, lest anything should happen that would be to the detriment of so great a mystery. Never to be used for containing the Blood of the Lord are flagons, bowls, or other vessels that are not fully in accord with the established norms. (Redemptionis Sacramentum 106)

It is strictly required, however, that such materials be truly noble in the common estimation within a given region, so that honour will be given to the Lord by their use, and all risk of diminishing the doctrine of the Real Presence of Christ in the Eucharistic species in the eyes of the faithful will be avoided. Reprobated, therefore, is any practice of using for the celebration of Mass common vessels, or others lacking in quality, or devoid of all artistic merit or which are mere containers, as also other vessels made from glass, earthenware, clay, or other materials that break easily. (Redemptionis Sacramentum 117)