[grymoire1]

Nope. As someone who administered a VAX with 50 simultaneous users, it's not a problem. It only affect that process and that user during that session. A logout resets everything. A more interesting problem was trying to read or write to a serial port that was hardwired to use a different baud rate.

You could type "stty 9600 /dev/tty4"; cat file >/dev/tty4" and it wouldn't work because when stty exited, the system would reset the terminal baud rate.

The proper way to do this (assuming you weren't the sysadmin and couldn't modify the default per-terminal baud rate), was to type the following

(stty 9600; cat file)>/dev/tty4