I wasn't having a go at the kids. I was one of them myself once! if someone offers you sweeties and sounds sincere about it, of course you'll flock to their rallies. I'd be at the front. seriously. especially if the alternative is is dull and reminds you of your strict parents.
jeez I went to hundreds of NUS events at that age. you join all sorts of societies, because you want discounts, you want to get laid, you want a free hoodie, you want an ISIC card that will get you cheap travel. the idealism gets overplayed. there were a few fringe groups for weirdos who actually 'like' cared about the world and stuff but most 18 years I knew were into music, cannabis and burgers in a bap. same as it ever was.