High school debate has always been broken. It has only very rarely been about the contest of ideas, and always been about how to win. For example there is a concept called 'spreading' in policy debate. This is where you speak as fast as humanly possible to lay out as many points as possible and if the opposing team fails to address or mention any of them you claim victory. For some reason this strategy, which makes the debaters all but unintelligible is allowed and leads to victory.
In Lincoln Douglas debate it was common to construct what is called a 'collapsing tautology'. Your argument is constructed to look like a series of logical steps with which there can be argument, but in fact all it is is a tautology that ultimately can't be refuted. It's a trap and if the opponent engages at all they lose.
More generally HS debate is politics and persuasion. Know the judges, build charisma, learn what works regardless of the content.
The introduction of a new noxious debating strategy might be noteworthy, but it is no more ruining debate than all the others, and the students don't actually care about the strategy or its tenants any more than they care about the validity of Rawlsian justice.