bike security

zntrx Posts: 27
edited January 2015 in Road general
Having gotten a bike nicked last year I'm now a bit more conscious about security.

What's the opinion on the bike registration sites? Are they worth while or are they ultimately no better than knowing the frame number to pass to the police in the case of a theft and what marking is it worth putting on a bike?

Assuming they are worthwhile is any particular one recommended?