Unfortunately the ruling means that yes, these Pokemon are banned in gen4 OU (shouldn't be in lower tiers) because that is their only ability. Because the ability is banned and not the Pokemon, the message on Showdown is correct (although Wynaut and Wobbufett are banned solely because of Shadow Tag). There was a time this also applied to Froslass (Snow Cloak being banned), but that has since been revoked.Quick question: there was recently the decision to completely ban Sand Veil from the DPP OU. This also results in the ban of mons mentioned here. Therefore, are these 6 mons technically Ubers? We would be in the same situation with Shadow Tag (Wynaut and Wobbuffet), but the message on Showdown is different:
Because these Pokemon are usable in tiers lower than OU (including LC), they fall into those tiers regardless of this ban as transivity is supposed to be broken such that metagames like gen4 NU where Sandslash, Cacturne, and Gabite are usable are not effected a decade after they were last popularly played.