Some of the mess with Wizards is the open use of scrolls. Seem to recall int early DnD versions scrolls where class restricted, so a Cleric could not use a mage scroll. In fact this was a nice perk of a rogue as I recall that they could use some mage scrolls. Something a fighter and cleric could not do.
In 5e scrolls *are* class restricted, in the sense that the spell has to be on your class's spell list:
"A spell scroll bears the words of a single spell, written in a mystical cipher. If the spell is on your class’s spell list, you can read the scroll and cast its spell without providing any material components. Otherwise, the scroll is unintelligible."
