nattienat: Open your Monitor window. At the bottom of the window it will show if anybody is uploading from you. Also in your Library window, to the far right of each folder it will show if anybody had downloaded from you.
As far as the above discussion goes & possible paranoia. Why not use Peerguardian:
http://peerguardian.methlabs.org/pg2.html (FREE) which will block out organisations attempting to see if you are uploading & downlding, etc. Your isp will then be the only ones who know for sure if they make any effort to watch for that type of thing. And depending on the policies of your isp & the laws of your country then you should remain reasonably safe.