People...
If you really need to double-park someone,
If you desperately need to get down from your car this second,
If you really have to block someone else's car,
If you have no choice but to obstruct the traffic....

Then, PLEASE post your damn number on your windscreen! And if you don't happen to do this, then BE ALERT when your car is honked for like 100 times which lasted for many many of 10 minutes!!