My, that's a broad question. Not sure that generalising will help at all.
The 'danger' I see in Buddhist communities is the mix with local culture, the clinging to said culture and the way Buddhism is practised in that community. Sometimes I think that Buddha would turn in his grave if he could see what's going on. But, such is the way humans function, I guess. Everything has to be adapted, everything changes. It's just the way it is.
Buddhism in Thailand seems very much to be influenced by King and culture. And what I hear from teachers is that the Eastern cultures have completely different challenges when it comes to meditation. Some seem to take meditation and determinations made not so seriously, some have way too much confidence and are easily prone to, indeed, worshipping.
Even monks are not exempt from being stupid. Everyone is deluded to some degree. Some more than others. This is all, imho, even more reason to be true to ones own experience and to remind oneself that everything another person says is an opinion. And you don't have to do anything with the opinions of others.
When it comes to minds being mislead. Of course this can happen. There are more than enough examples in history and present day. Maybe it's in part due to a lazy attitude: "Someone else has thought things through, so I don't have to." And, another part is the desire to be part of a community, I guess. Trying to belong to something, feeling save amongst the crowd. I don't know. Maybe sociology has the answers you seek?