If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
The basic answer is not to talk to these people.
Do not answer questions about what time it is, do not enter any conversations at all. At most say "sorry" and walk on.
Just. Do. Not. Talk. To. Them.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.