Хуже всего будет, когда они дадут юзерам возможность плюсовать за наличие какого-то тега в тайтле

лучше бы они отказались от этой идеи совсем

Пользовательское плюсование - это в любом случае риск или троллинга, или набега фанатов/хейтеров, или просто нешариков

Your list tags can still be used as normal. If your existing tag (e.g. Isekai) matches MAL's pre-defined tag (e.g. Isekai), then it will count as a vote for that Theme. If your custom tag (e.g. weroi1h51ohq) does not match MAL's pre-defined themes, it will not count as a vote. How many people voted on a theme will not be visible: there will be a threshold required to meet for it to display on the entry. This threshold can be bypassed if a moderator sets it. A theme can also be removed if mods blacklist it for that entry. I know how users like to use list tags (e.g. some people like to fill them with sentences instead of words) so please don't worry that your tags will somehow be invalid

The genre list is made as few as possible to limit the number of genres which must be set by moderators only. Users can vote on themes precisely because moderating the addition of many, many new themes would be impossible from a moderation-only standpoint—we don't want Themes backing up the queue.

Rapidly expanding our genres/themes is simply not feasible without community aid. Nor is it feasible to require mod pre-approval for every entry. So we are striking a balance between community voting power (Themes) and moderator pre-approval (Genres)