This issue is discussed every year or two. Just like red rushing against noobs.
And each time, after getting bruised in discussions or real games, the community returns to a simpler and more unambiguous option – it's not allowed, period.
I would also note that when developing rules, it is useful to consider the need to unify them with other sites. And in WT, the restriction on red rushing is implemented programmatically, specifically in the form that currently exists on ХВ.
Yeah, we held out for 2.5 years. Read about it here.