In CS 1.6, I often see that some players have blinking "talking in voice chat" indicator. It looks as if they press "voice communicating" key very fast, but don't speak anything.

Processor Information:
    Vendor:  AuthenticAMD
    Speed: 2300 Mhz
    2 logical processors
    2 physical processors
    HyperThreading:  Unsupported
    FCMOV:  Supported
    SSE2:  Supported
    SSE3:  Supported
    SSSE3:  Supported
    SSE4a:  Supported
    SSE41:  Unsupported
    SSE42:  Unsupported

Network Information:
    Network Speed:  

Operating System Version:
    Ubuntu 12.04.1 LTS (64 bit)
    Kernel Name:  Linux
    Kernel Version:  3.2.0-37-generic
    X Server vendor:  The X.Org Foundation
    X Server release:  11103000

Video Card:
    Driver:  ATI Technologies Inc. AMD Radeon HD 6570M/5700 Series

    Driver Version:  4.2.12002 Compatibility Profile Context 9.012
    Desktop Color Depth: 24 bits per pixel
    Monitor Refresh Rate: 59 Hz
    VendorID:  0x1002
    DeviceID:  0x68c0
    Number of Monitors:  1
    Number of Logical Video Cards:  1
    Primary Display Resolution:  1366 x 768
    Desktop Resolution: 1366 x 768
    Primary Display Size: 13,54" x 7,60"  (15,51" diag)
                                            34,4cm x 19,3cm  (39,4cm diag)
    Primary VRAM Not Detected

Sound card:
    Audio device: 

Memory:
    RAM:  2945 Mb

Miscellaneous:
    UI Language:  English
    LANG:  ru_UA.UTF-8
    Microphone:  Not set
    Total Hard Disk Space Available:  297340 Mb
    Largest Free Hard Disk Block:  225300 Mb

Installed software:

Recent Failure Reports: