That's correct.

Many think that they are not traceable when using these services .

Those who are in IT Telco data comm line should know that in each TCP UDP  packet that goes thought the array of network, especially when it is passing through their isp network, reach packet has an "id" and service port number tagged to it.

If authorities really want to trace you all down, don't cry father mother.

Install wireshark , sniff your traffic.  And you will know what I mean.