But if FromSoft cared to moderate the messages they could; there are a limited number of combinations that can be made. FromSoft instead encourages the behavior (e.g. by always having a few dead NPCs hanging over a railing with the butt facing the player), which is fine because they make games for adults.

The annoying thing about Roblox is that they're really not trying to experiment and figure out what could work, instead hanging on to a chat model that kids definitely can hack around.