I made this little plugin in about 10 minutes using the "create_panic_event" event. I haven't tested this but it should compile and work somewhat though on the events page it says this event doesn't always occur when the panic event actually occurs.
PHP Code:
/* Left 4 Dead 2 Panic Events */
#include <sourcemod>
public OnPluginStart()
{
/* Hook Panic Create event after it has happened */
HookEvent("create_panic_event", OnPanicCreate);
}
public Action:OnPanicCreate(Handle:event, const String:name[], bool:dontBroadcast)
{
/* Copy the UserID from the event over */
new uId = GetEventInt(event, "userid");
/* Now get the person's name */
new client = GetClientOfUserId(uId);
new cName[MAX_NAME_LENGTH];
GetClientName(client, cName, sizeof(cName));
/* Now tell everyone who created the event */
PrintToChatAll("\x03[Panic Event]\x01 %s created a panic event!", cName);
}