Bypassing syslog by not detaching from terminal(option -d),
it is silent while there is traffic or segfaults.

tcpspy -d -p										   : no output
tcpspy -e ' not raddr 195.210.91.83' -d		: no output 

tcpspy -e ' raddr 195.210.91.83' -d
other tty:   telnet 195.210.91.83 80		-----> tcpspy segfaults