Unfortunately, Meza's own conversion may have been valid, as he has been able to get into a study program in Israel Aish in Jerusalem, if it could be proved to have been invalid- that would be a solution to the problem that is "Asher Meza"- he would be done. Also, his legal documents he has posted (his Israeli ID card) has him as George, is there something showing his as Jorge? It does seem his smicha is FAKE as well. His study at Aish was only for a few months and there was no word if he did complete it or not. The smicha he boldly posts up is blurred out.
As for his mass conversions, I am sorry to say this and I know people will disagree with me. BUT, it's not as simple as saying that they are false conversions. The real issue is that unfortunately- there may be some validity in them bedieved. The danger is that Meza twists Torah and pulls down all the fences and says that everything else is "rabbi worship".
The issue with Meza's mass conversions:
The issue of could they be valid "bedieved"- in the simplest terms- possibly. If we look at Mishneh Torah Issurei Biah Chapter 13 you find that even when conversions were banned in the time of King David and King Solomon, people still did conversions that were performed not by the courts but by ordinary people (so an ordinary Jew who was not a judge) would perform such conversions. Officially, that "convert" was not turned away and not treated as a non-Jew, but not accepted or able to marry a Jew until his or her righteousness was proved. In other words, as we can see bedieved, there might have been some validity to their conversion. Same with Sampson who converted Dalilah- who was technically still not allowed to him for her ulterior motives but was not obligated to divorce her because of some type of bedieved- conversion.
As such, Asher Meza is very much aware that NO ONE in the Jewish community is going to accept his "converts". No one will and the fences and requirements stand in regard to converts following the process that the Batei Din (by 3 Jewish born rabbis) have placed. However, Asher Meza is also aware that bedieved, he is creating a situation where in the simplest form- some type of a quasi type of conversion might have taken place.... (like a Hebrew national conversion- not Kosher in reality but maybe kosher for the most lenient definition).
Asher Meza is VERY much aware of the situation he is creating with his mass conversions, because he knows that if there is any doubt in these people's Jewishness safek, then now that they did some type of conversion- bedieved, he insists the Jewish community "reconvert" them and is hoping to get his "mass converts" a little push and into a more lenient giyur lechumra. (rather than if they had gone to a beis din and started a giyur for a few years). Because now he gave them the safek status. He has actually stated this in his videos and it is his goal. To fill Judaism with his gentiles and give them some mass bedieved type of conversions knowing they will not be accepted, and trying to force the Orthodox Jewish community to accept these people and reconvert with a giyur lechumra so that there will no longer be a question in their status. In other words, Asher Meza knows exactly what he is doing with his "mass conversions" and there is actually something more sinister going on than just "mass converting people". He is hoping to mass convert people in order to force Orthodox Judaism to reconvert them properly and fill Judaism with these gentiles as he wants (because he feels Judaism is too blood oriented) and he is also observing if his "mass converts" get mistreated in order to accuse the Jewish community of not loving the ger and baseless hatred. What he is doing is more than just mass conversions, but actually his attempt to take over.
The issue also is that Meza and all his loonies are ALL converts themselves and they are not supposed to be judges like in a Beis Din. But since they are dealing with non-Jews, I don't know if this would mean they can't be judges over converts or not. If gerim are not supposed to be judges over people becoming gerim at all- then we don't have to worry about any validity in any mass conversion, issues with it being valid, bedieved or not. As we know, a ger tzeddek, righteous as he may be, is not one who would end up in a position of authority.
I think the best way to expose this FRAUD is to talk about his latest video where he states that "Messianic Jews are not heretics" and pretty much condones their work and to expose his FAKE smicha to prove he is not a real RABBI.
http://www.chabad.org/library/article_cdo/aid/960661/jewish/Issurei-Biah-Chapter-Thirteen.htm