The above passage was a letter to some kind of popular magazine (I forgot the source). As such, I don't think that the reader is merely trying to give us an explanation for why he/she hates cheerleading (why send in a letter for that?), but is trying to persude us that we all should look down on cheerleading.
1) Cheerleading: Booh!
2) Cheerleading is not safe.
3) Cheerleading is dumb.
4) Cheerleaders have Velcroed-on smiles.
5) Cheerleaders do bizarre arm movements.
6) Cheerleaders do the same cheers everywhere.