"Your ISP has been reported of your activities through legal means" WHAT DOES IT MEAN?

[Explorer]

okay, so I made an account on an anime/manga forum a month ago, accidentally said bad about moderators, one mod did find that out and sent infraction to me, but I ignored. I got angry and threatened him very abusively in 10 days, we started bashing each other. Though he was a super mod and i was a normal member, so admins took his side and banned me. I was unable to log in, then i talked to one of admins through forum's 'guest section' and they said i was rude, insulted staff
member......therefore they permanently banned me and said my ISP has been reported of my activities through legal means.
I really don't know what does it mean?? I searched about it on google, but found thing. So please can anybody help me to explain whats the meaning of it? Will i get arrested for that?
I'm worried about it.
Thanx in advance