The random assortment of SAEs is all part of the fun.
Along with the size (hint: if you buy a pack of them in a stationery shop it will say they are C5) the ones which are self adhesive, but are so old (or have been unstuck over a kettle?) that they have no stick, and the window ones (probably nicked from work) and the ones you have to lick, not knowing where they've been.
Yes. Ban SAEs and make people pay the org's costs instead.