Privacy:

For Gmail:

They give you the chance on protecting your Google account with a 2 step verification which involves your password and you can also set up your phone.  It also lets you manage who can send you notifications and make comments on your stuff. You can also go incognito mode so pages that you open and files that you download aren't recorded in your history.

For my settings, I have the 2 step verification code and I also have certain people can send me notifications. I rarely use the incognito mode

For Blackboard:

You can choose what you want to make open to the public such as  your Email Address

1.      Address (Street, City, State, Zip, Country),  Work Information (Company, Job Title, Work Phone, Work Fax), and Additional Contact Information (Home Phone, Mobile Phone, Website).

2.      You also have the option of making your information come out in the user directory. You can also choose if you want somebody not to email you and have the option of taking your name out of the roster.

My settings are set to not show any personal information and to not be included in the directory. I also have no one blocked and I have my name in the roster of the classes that I am in.

For Yahoo Mail:

You can choose how you want your email to be viewed and you can choose if you want the full standard of Yahoo mail or the basic. They have similar settings as Gmail since you can choose who you want to send you notifications and you can change your password whenever you want to.

My settings involve only specific people that I want sending me emails. Also, I change my password often so I can have a less chance on getting my information hacked.

For YouTube:

For YouTube you can choose if you want your liked videos and playlists private. You also have the option to keep your subscriptions private. You can also choose what ads you want to watch and choose to opt some out if you want to. 

My settings are basic; I don't mind my playlist not being private nor my subscriptions. I just make sure to keep my password secure.

I feel that they all have similar settings in the way that you can choose who you want to receive messages and so forth. I also believe that they are all secure, but I think Gmail is the most secure. The reason I think this is because with Gmail you can use that 2 Step Verification and also be able to change your password using your mobile device.  The one that I believe is least secure is probably YouTube since people can manage to look at your videos no matter what. I feel secure in using all the services because I have nothing to hide, the only one that I mostly use though is my Gmail.