Quick review of weaknesses listed on the Wikipedia page for Tor make it pretty obvious that Tor is a threat to majority of users that if discovered be face serious, if not life threatening, responses.
Why do people continue to use it?
Why do people continue to use it?
In particular:
* Use a separate system for Tor traffic, never use that system for anything else
* Don't use BitTorrent (which you shouldn't be doing anyways - the network wasn't built for it!)
* Don't touch non-TLS sites, the exit node could be hostile
* Javascript off
Tor can still be useful as a building block of the next thing, but people should start demanding something better than Tor.