There are very few dedicated lanes. In fact the only one I can think of is on Brighton seafront which is full of pedestrians. There are plenty of shared-use lanes. It is against police advice for people cycling over 12mph (i.e. actual cyclists) to use these.
Do you mean the A26? The only time I've cycled down there (heading east from Lewes towards middle Farm) there was a bloke with two toddlers wandering about all over the cycle lane. Seemed a very odd place to go for a stroll.
I've genuinely see more cars going the wrong way up one-way streets in Brighton than bikes. I saw one go all the way round the square at the bottom of Trafalgar Street the wrong way, and nearly got run over by another going northwards on Norfolk Road, which is one-way southwards.
Yes, but if you're going to think like that then we may as well wipe out the human race, as some pedestrians are scum, some football fans are scum, some artists are scum, some accountants are scum, some botanists are scum, some women are scum, etc. etc.
These threads are frustrating as you come across alright the rest of the time!
What are these rules of cycle paths of which you speak?
Ooops, apologies!