No, this is not the only example. The prophecy of 1 Kings 13 must also be taken into account, and especially its fulfillment.
2 Kings 23:20 is its fulfillment: "And he slew all the priests of the
high places that were there upon the altars, and burned men's bones
upon them, and returned to Jerusalem."
It's also paralleled in 2 Chronicles 34:5
The reason why I am citing this as an example is because this was pronounced as a judgement much like Amos 2:1 which was referenced. So then if these false prophets were the recipients of an unusual pronouncement from a prophet of G-d, and they were singled out for punishment then the opposite is proven as the rule.
Should that not be enough, commandments such as
Deuteronomy 21:22,23 "If a man has committed a sin worthy of death and
he is put to death, and you hang him on a tree, 23 his corpse shall
not hang all night on the tree, but you shall surely bury him on the
same day (for he who is hanged is accursed of God), so that you do not
defile your land which the LORD your God gives you as an inheritance."
Despite the focus being on avoiding the polluting of the land it is clear that the action is barred for additional reasons, such as keeping the "humanity" of the corpse in mind and that some kind of burial is necessitated.
Joshua 7:26 "And they raised over him a great heap of stones unto this
day. So the Lord turned from the fierceness of his anger. Wherefore
the name of that place was called, The valley of Achor, unto this
Joshua 8:29 "And the king of Ai he hanged on a tree until eventide:
and as soon as the sun was down, Joshua commanded that they should
take his carcase down from the tree, and cast it at the entering of
the gate of the city, and raise thereon a great heap of stones, that
remaineth unto this day."