Why would these threads be frowned upon? Players who use ALTs in FFA sucks.
There are thousands upon thousands of players playing WL, of which folks reading the forum are a minority. The likelihood that someone will meet such player is very low, rendering the thread borderline useless. And even if some do, there is nothing they can do against them after that happened (unless they get to team up everyone against the cheater). So the thread has literally no use. If you really want to get rid of the cheater, then hit the report button. It really is self-explanatory <shrugs>