yes.
a lack of punctuation pisses me off tbh, it makes it hard to read and shows that you paid little attention in school and therefore shouldn't be using a precise program like hammer lol.
only thing i tend to leave out is capital letters because it takes too much time, a commar and a full stop are relatively easy =/
ps. if you use decent compile tools it removes any unseen faces anyway, so nulling is just a waste of time, unless it's in a place that players could see, but they'd have to be spectating at the time.
look at de_cbble for example, the little arched roofs at on the main roofs of the castle, the sides and some tops have been nulled to saved that 0.0001 fps drop (davej always was an anal mapper lol), and cs_havana, the back faces of the roads at the edge of the map, they have a texture scaled to around 5.00, looks noobish, but it's pretty clever tbh.