Oh I was just following the guide and wanted to make sure I could do every step if I needed to. Yes I read it is safer to keep them with each user account to avoid suspicion. I just wanted to learn as much as I could to get a better understanding of everything.
I know this is a old post but what if you have over 50 user accounts that would get annoying! So wouldn't clearing history be best on some user account?
__________________ "A man wrapped up in himself makes a very small bundle"
Benjamin Franklin
Or in firefox just hit ctrl+shift+delete and if you use Vzaccess manager click disconnect- re-connect than hit ctrl+shift+delete, once reconnected only 10 seconds have passed.
If you clear the cookies in each user account when you make the account you do not need to clear cookies over and over.
Clearing them will toss up a flag and you in most cases will get a call from eb or pp because it appears you are using a new computer and they will check on you.
If you use different user accounts, do not click on any email links and be careful about signing in and out you dont need to clear cookies all of the time.
i'm not sure why people are having trouble deleting cookies....every time i open a package and set them out on the kitchen cabinet, i "delete" them in no time....just wondering...haha
__________________ 111,111,111 x 111,111,111 = 12,345,678,987,654,321
Am I successfully deleting cookies?????????????? 
