Supporters of the "establish context" rule include:
Jimbo Wales,
Larry Sanger,
LDC,
Tim Shell,
Linus Tolke,
Janet Davis,
drj (strongly),
Koyaanis Qatsi,
GWO,
Damian Yerrick,
tbc,
AxelBoldt,
JHK,
Enchanter,
Tarquin,
Rotem Dan (strongly)
Opponents include: 24
24 - no one does this. Look at
ontology, the worst example I know. People just say "this is that" and then proceed... some of the first paragraphs bother to set up context, but not many. So I don't like this as a rule, although I do it wherever I can.