I've always held off on expressing an opinion about the supposed apparitions at Medjugorje. I know priests and lay people who have made a pilgrimage and it seems to have done them some good. Otherwise, I haven't paid much attention to it myself as the local bishops where Medjugorje is located have said some unflattering things about it..- At the direction of the Vatican's head for doctrine, the apostolic nuncio to the U.S. has written a letter stating that Catholics “are not permitted” to participate in meetings which take for granted that the supposed Marian apparitions in Medjugorje are credible.“The Congregation (for the Doctrine of the Faith) has affirmed that, with regard to the credibility of the 'apparitions' in question, all should accept the declaration … which asserts: 'On the basis of the research that has been done, it is not possible to state that there were apparitions or supernatural revelations,'” Archbishop Carlo Vigano wrote in an Oct. 21 letter to the bishops of the U.S., sent to the general secretary of the U.S. Conference of Catholic Bishops.
I'm not one of those Catholics who lives and dies by private revelations. Everything necessary for our salvation is contained within the Deposit of Faith which was closed with the death of the last Apostle. That said, there's nothing unreasonable in supposing our Lord has the power and the willingness to speak to individual believers throughout history. The Church has a rigorous standard in determining which are authentic locutions from heaven. Some of these private revelations have been deemed worthy of belief, and the Church even encourages believing them; the Divine Mercy devotion was born through a private revelation to a Polish nun after all.
Authentic private revelations, whether popular ones like La Salette and Fatima or lesser known ones such as Akita, all have a similar warning in common: God has had it up to here with our bullshit and bad things will happen if we do not all repent, confess, and do penance right the fuck now. No Catholic is obligated to believe in the veracity of private revelations, but the messages of the authentic ones are well worth considering in any case.