It might feel like the only way to deal with something like that is to remove it immediately, which is only a short-term solution when dealing with someones commander
Digimon Card Game - Booster Box - EX09 - VERSUS MONSTER
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The restrictions may still be broader, however, and in any case arguably go against the spirit of a trading card game
R Rare Dark Contract with Patent License X SPELL Field If your opponent Special Summons a monster(s) with the same card type (Fusion, Synchro, Xyz, or Link) as a "D/D/D" monster you control (except during the Damage Step): You can inflict 1000 damage to your opponent, also, while this card is on the field, your opponent cannot Special Summon monsters with the same card type as that Special Summoned monster for the rest of this turn
Madness is a triggered ability