I read a lot of music reviews, and over time it seems that I've been seeing sentences like this more often:
"The band are planning to return to the studio this fall."
This drives me up the wall! I went and read your section on collective nouns, but am I wrong to think that once you lump a number of people together into a group, that group becomes a singular noun?
Adele,
there is a lot of leniency on this subject and I'm afraid it seems to boil down to two factors: personal choice and context.
If the writer things that 'the band is' sounds odd, then he/she has the freedom to write 'the band are'.
Secondly, if the context makes it clear that the writer is considering the individual members of the band, then a plural verb should be used.
The band are planning to return...
To me, this means that each member is planning to return. If the writer meant the band as a collective are planning to return, then he/she could have used 'is'.
In sum, you can pretty much do what you want with collective nouns, I'm afraid. These example summarise the situation:
The shoal is moving north. (one body of lots of fish)
The shoal are moving north. (writer doesn't like 'is')
The shoal are darting in all directions. (individuals considered)
The shoal is darting in all directions. (writer doesn't like 'are')
So, as you can see. Help yourself to whichever verb you fancy. I used to be a stickler for rules, but the more I learn about grammar, the more I realise that there are few 100% rules.