I created my droplet 1 day ago, and since the first day I observed some weird activity. After I log in I get this message:

There were 452 failed login attempts since the last successful login.
Last login: Mon Nov 10 15:20:01 2014 from 78.96.. (this is me)

If anyone could help me elucidate this situation or how could I block this. Is it a situation I should worry ?