We have all seen it. The user that joins a server, then whenever he/she dies, says that it was lag, and they are a much better player. Most users believe this, and continue on playing. Administrators need to keep an eye out for this, because it can be griefing, and may require action.
Surprisingly, the way most admins see who is lying about lag is to use the TAB ping reading, which can be inaccurate. There is an ingame tool that shows lag, both server, and local, that i wish more people would use. It is the lagometer.
To activate it, type
/cg_lagometer 1
That gives you a little graph below the time and framerate numbers, and when lag appears, a bit of center print identifying it, and a graphic in the lower right showing specific information (connection interupt, etc). The green bar in the graph is local, and the blue bar is server.
This is a great tool, and for server admins, can help track down lag and kill it.
Please use a lagometer more, and if you are causing the lag that is hindering gameplay, please leave untill your ping drops. Thank you, hopefully this will make a server more fun.