If someone has blocked you on Twitter, you'll be able to send tweets to them, but it won't appear in their mentions. The only way they'd be able to see it if is they unblocked you to see it. They will be able to tweet you as normal, but they won't see what you tweet them.
Yes. Tweets will only disappear from your home page if the person blocks you.
Yes, anyone who is following you when your tweets are private can view them.
No, Harry Styles did not delete his Twitter. He still has a Twitter and actively tweets. His Twitter username is @Harry_Styles.
You can't do this. You either protect your tweets and approve people to follow you or you unprotect your account and your tweets are viewable and anyone can follow you.
It may just take a while for it to take effect. If it still doesn't change then you should email the help team who should be able to change it for you.
Anyone that was following you before you protected your account can still see your tweets/activity unless you block them or they unfollow you.Once your account is protected, only those people that you accept can follow you and view your Twitter activity.
Go to your settings and make sure that you aren't searchable by email address. There's a tickbox for this under your email address in your personal settings.
No, it won't show up.
No, they can't tweet you.
If you mention someone in a tweet, it can still be seen by everyone. Only direct messages are private.
You don't need to.
Twitter is comprised of tweets that are 140 characters or less. People use it to quickly "blog" about their everyday life to those who are following them. Your followers are people who want to be updated on your tweets and will see them on their time line. People's tweets that you follow will also appear on your time line. You can send tweets to individual users by beginning your tweet with @username ('username' being the person's actual username). If you follow someone who is also following you back, the ability to send "direct messages" (Private messages) will be enabled and you can have private conversations with others, although these are still 140 characters or less. There is also the ability to make "lists." You can add specific people you follow to a list so that by going to this list, you will see only those people's tweets. For example, you might make a list with your favourite bands/artists, so you can quickly view all your tweets in one place.