Questão jurídica principal
Whether refusing the appeal in cause for excessive procedural complication was arbitrary under Article 9 of the Federal Constitution.
Decisão extraída
No. The cantonal court could, within its discretion, refuse joinder because the added parties risked excessive procedural complexity and delay.
Fundamentação extraída
The court accepted that the joinder mechanism must not be used dilatorily and that the prior procedural history showed a real risk of further incidents and delay. It also held that the appellants could raise their reduction/defense arguments directly without joinder.