Hmm that seems very subjective to me. Seems like there would be a lot of loop holes. What constitutes "scaring?" Any contact between teams? Telling a team they are going to match the offer sheet? Telling a team they will match but telling them they'd be willing to do a sign and trade if the price is right?
Also, didn't the Wizards already say they would match all offers for Porter? According to that quote you referenced, that would go against the CBA unless of course it's just "sources say." It all seems very subjective and something that could easily still happen.
Is there anything against the Kings going to the Wizards first and offering the sign and trade? If fearful that they will match (without the Wizards having any contact with the Kings), could the Kings reach out and offer a sign and trade to give them a little more incentive to let Porter go? Not saying it would be the ideal approach, but it seems like it would still be allowed under the CBA.