I agree. SOME people MAY be allergic to the venom of a Mangrove, and that might cause some difficulty. As far as Hognoses being TECHICALLY Venomous, because they are rear-fanged, they are in the same class as mangroves, as THEY are rear-fanged also. You can't make a distinction on "Rear-Fanged", they either are, or not. Both Hognose and Mangrove fall into that description.
BOTH are rear-fanged, one is not lesser than the other.

Randal Berry