Well... dont be too confident on that...
When an ISP assaigns a Dynamic IP to a customer, the date and time from-to that IP was assigned to him will be logged in their database and will keep the information for an year or so. So if some authorities enquire about an ip address doing some mal practice at a particular date/time, they query the database and tracks down your account number...

So dynamic ip is not safe either. But ya, it is far better than static in these cases.

I have a problem...

I was downloading four torrents and had a power failure. The torrents had downloaded almost 60%. When power was re-established and I logged on after the disk check, all the torrents in uTorrent was missing and I am left with the partially downloaded files.

Can I resume the download by any means ?

I just now found this great feature of uTorrent and saved my downloads.
All you have to do is add the torrents again and when saving location is asked, specify the location where the partially downloaded files resides.
uTorrent automatically does a recheck on these files and continues downloading
from where it was left off...

I love this uTorrent....

Ya, uTorrent has this unique feature of resuming broken downloads.
It is useful not only when the torrent configuration file is currupted,
but also when you reinstall OS or move downloads from one PC to another.

No partial downloads are wasted ever.

I would like to know the best and top torrent portals that offer most updated
torrents and removes fake and ADs.

Currently I use thepiratebay.org

I prefer to use Torrents Search Engine especially because it searches all other torrent search engines.

Fakes are everywhere... See the comments to confirm before download.
Mostly, top seeded and leeched torrents are trustable if they are there for more than a week or so.

By the way here is a list of URLS that may be of some interest...

isoHunt - World's largest BitTorrent and P2P search engine
TorrentReactor.Net - The most active torrents on the web
phogotorrents.com is under construction
PotUK Forums
Default Plesk Page
Download music, movies, games, software! The Pirate Bay - The worlds largest BitTorrent tracker
Torrent Portal - Free BitTorrent File Download Index and Torrent Search
::: TorrentSearch ::: The #1 Torrent Search Engine!!!
TorrentBox.com - Torrent Listings
Bitenova - Like other sites, but faster.
Mininova : The ultimate BitTorrent source!
NewTorrents.info - your 0day source
Torrentspy.com - The Largest Bit Torrent Search Engine

I loved to see that there are so many torrent portals..
Most of them though have a lot of redundant data too..

And I have recently found that there are some anti Torrent servers
that announce to have seeds of most popular torrents but are actually
some garbage data with same hash.

I would like to know how to ban a specific peer from the list.

ya thats true...
There are servers that give false packets and are built against the torrent community.
Experts are at continuos work to find out these and are listing their IPs in the banned list.
Every client checks these banned list before connecting.
And If a peer provides bad packet continously for some time, the client will automatically ban those peers.

As for banning a specific IP manually,
I dont think there is an option in any clients.
I would have loved to just right click on a peer and
select ban this IP if it was possible.
This is also helpful in blocking some leechers who never
give anything but takes up all the upload bandwidth