Some people also have very vivid imaginations lol
This law is only relevant between 2 entities - The Security Services and ISPs so it can't spread to local government. So you got that wrong. You don't know how the law works or how government is organised, that is probably why you are so confused? I do realise other laws were misused but they have been repealed or changed so nothing is set in stone. I and no one I know was ever stopped and questioned, I understand a few people hoping to post something on YouTube engineered trouble for themselves.
GCHQ don't have the resources or interest to read everyones email. They are looking for major security threats to the nation, nothing else.
They have requested this apply to all citizens because they a) don't have a complete list and b) don't want to compromise investigations by handing lists of names to ISP's.
I really don't give a shit about anyone following my internet habits, reading my email, opening my post because they will never find anything illegal.
I hope this makes life much more difficult for thoase engaged in illegal activity and terrorism and I feel nothing for them. If this means that sometime in the future I can get on a plane and go on holiday without standing in a line for an hour and removing my belt and shoes I will be perfectly happy.
RE David Davis - he is a very sad, bitter man who had his political carrer ended a few years ago after poorly run leadership campaign . He will say anything to get revenge on his political enemies (much like gorgeous George Galloway).