If I'm not mistaken, that's already going on. The problem with such a proposal is, if people start posting the winky emoticon, with all kinds of code words in quotes, it will become obvious that the rules are being flaunted. As long as that's not going on, then what one does not know or cannot prove, cannot be used against anyone.
I will say this however. If there is a law enforcement official on these forums, who decides that even though forum rules are being successfully skirted, that he/she doesn't like the fact that people are obviously screwing around, just beware if they decide to make an example of you. Records can be subpoenaed, and that includes IP addresses, PM records, e-mails, cell phone records etc.
My quiet suggestion to all of you is, if you recognize who the obvious Cuban cigar smokers on the board are, send them a PM. That's why the function exists, so that you all can discuss PRIVATE matters in a way that SHOULD be kept private. I think all such hair splitting of the rules, and attempts to talk me or other staff members in to accepting winks and nods, should be abandoned in favor of the PM function. Thank you.