Actually the "WEEKEND GENERALZ" were self-enforced and probably the worst thing that could have been done. Because then janitors actually did start treating them as though "weekends only" was an actual rule and not something anons came up with themselves.
Couldn't start a thread about the show at all on a weekday without multiple comments about IT'S NOT THE WEEKEND etc. The show was seen as forbidden to some extent, at a time when it was much less popular and had a reputation here as being for "pedophiles" for whatever reason (like /co/ doesn't constantly obsess about younger characters than this).
Even when the new season started, threads about the new episodes that had just aired were deleted until janitors caught on and realized Star Vs. is a show that does, in fact, exist.
I actually don't remember weekend threads ever being banned. They just held back any legitimate discussion of the show until Season 2 began, and then we've had nonstop Star threads in some form or another ever since.
Basically, trying to enforce posting about a show only on specific times only ensures the show will eventually be viewed as something that doesn't belong here. Don't do that.