I propose that we behave seriously, without mention of FSMs or crisps. I agree with the use of SI. I think we should discourage the use of non-SI units. Clothing, food, etc. should all be sold primarily in SI units. (However, we should not abridge the freedom to sell them in traditional units.) Exceptions to this rule can be made for those items with "deeply traditional units", for example, beer being sold by the pint. The "deeply traditional units" being established by the ministry or an appropriate delegate thereof for certain classes of goods. In all cases, let the SI equivalent be displayed. (It shall be sufficient to display it once, visibly, on any menu/etc. thus, in a menu listing several beverages and their price per pint, it is sufficient to list the SI value once at the bottom.)