When did people begin this annoying and innappropriate use of the word "we"?

Over the past decade or so, I have noticed something that really gets under my skin. It is the use of the word “we” when discussing certain people’s behaviours.
For example; Studies show that we continue to smoke too much
Or; Experts say that we eat too much meat
Or even worse; Our children watch too much TV
I beg your damn pardon.
Anytime you say we, that includes me.
And if you are saying what other people do, but I do not, then you are including me in something where I do not deserve to be included, for better or for worse.
And I don’t like it.
And just for the record, I know why.
It is just one more not so subtle attempt to beguile people into imagining that there is this large, amorphous organism called society that sort of has a mind of its own and demands that we act in accordance to its whims.
But anyway, where specifically did this start?
When was the first time you noticed it?
Does it bother you?
If so, why?
If not, why not?