Xythe, I am curious if you second his opinion of Sesame Street? I am curious if it is a UK wide thing, or more person by person?
I used to watch it with my mum every weekday at lunchtime before I started Infant school, and I know she did the same with my sister. Pretty much everyone around my age that I know did exactly the same. When it started airing in the 70s there was a ton of opposition to it from teachers who accused it of sabotaging kid's education before they'd even got into the classroom, and the BBC refused to buy it as a result and it landed on one of the minor ITV regional operations. But I assume that must have blown over by the late 80s when I was in its bracket because it was on Channel 4 (which is one of our big channels), and my mum wholeheartedly approved of it (and if teachers were against it, she wouldn't have). I haven't seen it on listings for a great many years though, I don't think it even lasted 10 years after I would have stopped watching, but for a while it was quite a big thing.
EDIT: But, to actually answer the question, I don't think too many people would give a crap if you slagged off Sesame Street, it was only a big thing for a small number of years. Blue Peter though, is an institution.