Uh. no. Rules and tweaks and fixes came about because the developers didn't anticipate everything that could happen in this game.
My guess here is that Bonnie doesn't remember '97-'98. Monsters didn't have pathfinding. One flour sack could stymie a monster from following. Yup, every dungeon you might have visited had flour sacks in the hallways.
If there was a rule against that, it certainly was not being enforced.
We had large events using flour sacks to make an "arena." Monsters would follow a player through gate travel gates, so the monsters could be brought in for the events that way. I did not hear of anyone saying "don't do that." Eventually a change came in that monsters would not follow through gate travel gates.
This was the era where there was a 'sploit using gate travel to "push" a perp into a house. Instead of making a rule against using 'sploits, the developers at the time said that this was "a creative use of magic."
This was the era when houses and boats could be placed in dungeons, and as a result, the dungeons had houses and boats in them. There was a house where The Piper's altar is now in Despise. The waterways in L2 Shame were absolutely covered with boats.
Slimes would reproduce when hit with less than lethal force, with the new slime atop its parent. In short order, a shard-crashing number of slimes could be produced.
Fixes and adjustments came, of course. "Three fireballs could kill anyone so all the PKs were mages" got fixed... and then "Three arrows could kill anyone so all the PKs were archers" got fixed... and then "a half dozen hits with a quarterstaff would break anyone's armor and then kill so all the PKs were macers" got fixed... etc.