I think you may be exaggerating a bit there. Brighton is a Green controlled council and they haven't suffered. Yes some of their ideas are mental but we are talking about EU elections here, not letting them run this country.
Their manifesto policies are a lot more sensible than the list above and they are for having a referendum to decide whether or not to leave the EU.
I think it would just be refeshing to see some change from Tories and labour for once. And I don't think the lib Dems offer much different anymore and UKIP are definitely not the right vote for me!!