Then one should either be prepared to defend their position at all
times or not let their mouth get them in a situation that they can't
handle.

One should always be prepared to defend one's position intellectually.
One shouldn't have to defend it bodily.

If you start spamming a group

We're not necessarily talking about spam. That's not the only reason
people use anonymity. Posting (on-topic) opinions with which some
people have violent disagreements is another. While that may not happen
here, it is not unheard of on the rest of the net.

Jose
--
Get high on gasoline: fly an airplane.
for Email, make the obvious change in the address.