(Dh already is...)
It's a bone of contention with me that the letters which come home from school (ds1 for now, ds2 as well, as of September) invariably have spelling, grammatical and/or punctuation mistakes in. For example, the teacher who is Literacy Co-ordinator seems to have no idea how apostrophes work and has signed her name to several glaring apostrophical (OK, I made that up) errors...
Another classic this week: a covering letter and sponsorship form in aid of Art's Week. Three times it's written as Art's week, so not just a one-off typo.
I suggested to dh - and he is begging me to do it now - that on the sponsorship form (two incidents of the error) I add a note to the effect:
Always happy to support school in any way but I have to ask: who is Art and why are we supporting him?
Shall I....shall I?