It's 100% against the TOS to do this. It falls under the category of impersonation.
Whoever's doing this will have the account banned, and the name will be locked so that no one else can use it.
So it would be justified to ban somebody that has the same username?
Say for instance, if I saw two users named 'Deadpool',
One with a L at the end and the other with an uppercase I, I can go report either of those two for impersonation?
Conicidental names are not subject to the TOS. Creation of an account with the intent of impersonating another user is.
So to use your example, if you're Deadpool and I happen to create a Deadpoo(capital I) account, that's no harm, no foul. We both like Deadpool.
If, however, you're Deadpool and I create an account that looks like your name, then go around claiming to be you, I'm guilty of impersonation and subject to a ban. At the very least, the impersonating account will be locked out so that I can't go on impersonating you.
So if I made an account name 'HearltWow' with a lower cased L, purely coincidental by the way, and went on PlayStation Home minding my own business, that is okay still?
What if I got into an unintentional argument over another user and they decided to spread my name to insult me? Would you still ban me if news of that ever reached you?
As long as you don't represent yourself as me, you're free to do whatever you like. You'll have to pick someone else, though, as the HearItWow variants have all been locked off due to an impersonater.
Let's say there's a Dave575 and a Dave_575, just to use a very obvious example. Dave_575 is a troll, but he's not trying to impersonate Dave575. Unfortunately, Dave575 is going to take some flack for what the other user is doing, but there's really nothing he can do to stop the troll. That falls squarely on Moderation's shoulders. Dave575 may even ask them to get rid of the guy, but unless he's been trolled personally, there's nothing he can do.
It's a bit like going through life with a name like Jeffrey Dahmer. Sure, you're not -that- guy, but people are still going to give you strange looks when they hear the name.
I Created a Japan Account using my same Username (it's AL2009man as a Original Name, al2009man as PSN ID) that is named "AL2010man" adding "2010" (my 2nd account i created) later i Created my EU account that is without "AL2009man", now it "lolman152" (you may noties it as used on my Facebook Account that is /lolman152) Later last year i created a account for used of Testing on LittleBigPlanet 2 that is "AL2009man_Test"
Meh, i can't text more. have to leave
damn, thts suxs, gttn impersonated, personally i think the impersonator should be put in front of a firing squad or stoned by the public, but in reality do you think maybe its one of your supposive friends doing this to you, how can they possibly no who your friends are, (maybe a friends the culprit, hope they get banned for life without parole, n thats all i gotta say about that.