No responses to my original questions, but I think I understand why; it would be difficult to speak truthfully and directly to my question "What does the vinaya say which might be relevant? " without breaching customary etiquette and perhaps vinaya rules.
As far as I know, the Buddha did not establish (or even allow) the ordination of trees, symbolic ordination, use of what I assume is donated robes cloth like this, encouragement of superstitions. But I understand, if it is a breach of what is allowed, the discussion would probably be private among the ordained.
Which in Thailand will not include any women at this time, because I understand Thai Buddhist hierarchy teaches they are defective material.
I do not think this is harmless, funny, or consistent with the Dhamma. And I am willing to say this out of respect for the Dhamma, the Sangha, and (neither last nor least) the Buddha.
I suggest those involved consider, is the preservation of forests even environments condusive to meditation, consistent with homelessness, impermanence, Right effort?