First - don't shoot the messenger. The rules are
explicit - you can't use items for unintended purposes. Period. It's pretty clear IMO.
Second - The rules ALSO say that just because it is not allowed doesn't mean doing it get's you penalizezd. (I draw your attention to the fact that you left that piece out of your quote.) The piece you cut out indicated that there is no corresponding penalty to the referenced rule unless you are warned by the referee and then did it anyway (which is a situation that the original post did not contemplate). Since no penalty is applied if the ref isn't watching, or if he doesn't warn you, there is nothing stopping you from doing it. It's like saying "don't speed, but there are no cops to ticket you."
If my table had a brass bridge with ridges, and I used the cloth to cover the bridge, I would
be using cloth for an unintended purpose. The rule is pretty simple really. Now, whether I got penalized or not, that is up to the ref.
That's why - I carry two bridges in my case - the one with padded sides and the cantilever action

AND a bat bridge. I'm set.
-td <- just presents the rules, doesn't write them.