I think it is absolutely everyone's right to vote, not vote, spoil the ballot or whatever.
The real problem is that none of us actually have a vote of any meaning unless we live in one of the very view swing constituencies.
This is because FPTP disenfranchises most of us. My vote is pointless. Only one party has ever won a seat where I live.
Everyone forgets (which is convenient for the 2 main parties) that the pact the Lib Dems made with the Tories was to get the chance to put forward the option of PR.
Everyone remembers the Lib Dems selling out the students to try and get this through. But we the voters rejected it (yes I know it wasn't perfect but it was a step forward).
So although as I young person I loved the slogan whoever you vote for the Government get in, I know think that the reality is we get the Government we deserve. If you listen to any phone in programme or the BBC trying ever so hard to be in touch with "ordinary" people, we have all become so dumbed down by personality politics that it is possible to elect a complete buffoon and / or liar and people are proud of them representing their country (and I could be talking US or UK). Because they have a good "media" personality.
We are trapped not just by FPTP but by the degrading way the media persents and manipulates party politics.