Hey mate, you're right! The blockchain protocol itself won't be stopped, however it's the ISP's that point Bitcoin service providers like; Bitstamp, Kraken, Localbitcoins, etc. that concern me. If the ISP's are directed by government to block these services it will at least deter some BTC businesses and startup ventures like mine from incorporating in the UK.

This potentially will also prohibate the use of encryption based technologies, like iMessage, WhatsApp or PGP data transmissions.