Note that the Minchas Chinuch says that literally placing a stumbling block before a blind person is not a (Biblical, at least) violation of this avera (according to what I've read in the "Torah Lodaas" weekly sheet by Rabbi Matis Blum; I didn't look up the Minchas Chinuch myself).

Note that the Minchas Chinuch says that literally placing a stumbling block before a blind person is not a (Biblical, at least) violation of this avera (according to what I've read in the "Torah Lodaas" weekly sheet by Rabbi Matis Blum; I didn't look up the Minchas Chinuch myself). However, the Meshech Chochma disagrees, holding that placing a stumbling block is included in the Biblical prohibition.