Please see the comments above. Snopes does not dispute that the fact that the FB Messenger App does force their users to agree to all stated "perrmissions":
Snopes does not say the article is incorrect. Snopes rates it as a "MIXTURE: Multi-colored bullets identify claims which are a mixture of truth and falsehood."
Snopes has a problem with the author's conclusion - not disputing the FB Mobile Messenger TOS:
"Whether Facebook Messenger's TOS are truly "insidious" or not, Sam Fiorella warned that if users are willing to accept TOS as lengthy and involved as Facebook Messenger's without reading them, app developers might be "emboldened" to include even more potentially invasive conditions in future TOS:"
