Honestly, it would not be a vanilla experience without mass trolling. In Vanilla, for a very long time, you weren’t limited to 2 messages a minute in trade, so spammers could actually spam to an unlimited degree.
Argent Dawn was the Moon Guard of Vanilla, and PVP servers loved to target AD as their troll server. They would roll gnomes, run to IF and the troll and harass roleplayers relentlessly.
Trade would just become an unending stream of:
“BLACKROCK DOWN”
“BLACKROCK DOWN”
“BLACKROCK DOWN”
Ad nauseam until you either managed to use up all of your ignore spots or just left or muted Trade. Even reporting the most egregious would have zero immediate consequences
But that will not happen in Classic. The Modern UI limits spam and trolling, and the right click report feature temporarily ignores offenders. There is nothing to fear or be really annoyed by anymore.