The only tool that TFL uses is google analytics. That tracks what forums users use. However, if you are using FireFox, the addons Do Not Track Me; Ad Blocker Plus and Better Privacy will defeat most tracking and ad software.
As for malware, as zxcvbob said, any linked photos from certain servers can cause a "false positive."
As with Tom Servo, I also run a Linux box, with a firewall. My ADSL box uses NAT and routes certain UDP and TCP port calls to a black box. Never had a problem with the TFL/SWAT Mag servers, ever.