Therefor they respond with insults of their own. Same as with nations. Same as with little kids. If you are interested in running a discussion list, check with your Internet Service Provider. Some ISPs offer a listserver option as part of their service.
Prices vary, some ISPs provide free lists, while others charge hundreds of bucks per year.
To get your feet wet, you might consider signing up with a free commercial list service. These lists are provided free, but advertising is added to every message. If you have direct access to your system, you might consider running a list based upon a script or system software. 7 to caution about the dangers of changing light bulbs. 53 to flame the spell checkers 156 to write to the list administrator complaining about the light bulb discussion and its inappropriateness to this mail list.