How about some way to alert poster#1 that poster#2 wants to engage poster#1 in off topic conversation on the The NEW Parking Lot?
On that board specifically, allow some means of having a mailbox notifier alert poster#1 that poster#2 is in The NEW Parking Lot, and waiting for him/her to start arguing.
Step aside son, you're blockin' the MOMO!
Disproving absence of evidence should be easy, show the evidence of.