Instead of nuking the posts, how about having them hid, so a moderator could bring them back, if so desired? Say, per bad-behavior on the part of the hider.
Yes, but people, being people, never obey the TOS anyway.
See, for example: "Don't feed the trolls" they keep saying. and it keeps not working
And, yes, I also contribute the off-topic discussion. Mea Culpa.