Between pedoforum and probably freedom hosting one thing is clear, the feds are starting to hack hidden services they cannot trace and hack the people visiting them from them. I wouldn't feel very safe anymore unless using layers of isolation. Another possibility is that the feds have finally realized Tor hidden services have shitty anonymity, and they have taken to tracing them with traffic analysis and then after seizing them they inject exploits into the sites hosted on them to catch the harder to locate users connecting to them.