I would rather the government outright bans things rather than pseudo-banning them via the back door via taxes. At least then they have to expend an appropriate amount of political capital, and there is a proper amount of debate over it.

We had in the UK the sugar tax which was an effective ban on added sugar in soft drinks - you can hardly buy any drink without artificial sweeteners now, all of the old formulations were taken off the market because they were uneconomical. However, it never prior received attention as a ban, it was always described as just a "tax".