I'm sure that the vast majority of modifiers would actually be fine in community levels as you say, although in discussions before it's not just performance issues that get raised, also the fact that logic triggers won't always work with some of the modifiers/zones of effect, or a deeper issue like you've alluded to. Writing out that hypothesis would be tedious here but the summary is that there *might* be more complex issues with maps breaking using certain modifiers. Again, probably nothing serious for most levels, and a disclaimer could resolve that.

It's a very reasonable point about making it clearer that's the reason the game doesn't have them in community levels, I guess it's a popular question on the Discord and gets answered or linked back to quite a bit, but if you're using Unity Explorer to trigger modifiers usually available in the scenarios for custom levels then I can't imagine a disclaimer would be necessary because the game's certainly not intended to be designed that way, by their nature all external modifications and interfaces are experimental when the game hasn't been designed in conjunction with them. I'm pretty sure that's not what you meant but summarily people never complain that custom levels aren't working *because* of a modifier currently and those which are excluded feel a bit far off making a difference.

its actually possible to enable "everyone hates me" moddifier. you pick it through normal scenario, and then come back to fanmade.
ITS A BLESSING I LOVE IT

and still, console commands for all modifiers would be nice...