These days On TV Rin is showing a commercial (Rin Vs. Tide) which is just like a face to face fight. It is unexpected ad, as till now no company has done this type of direct ad and also had not pulled the leg of others. I think this is also not allowed and is illegal.
Instead of this, the ad has released and being shown on TV. Big Question how it has been approved for TV?
Rin Detergent vs. Tide Naturals
http://www.youtube.com/watch?v=2M5rBXtK9iA
Also i have seen same concept used by spicejet for its banner ads on web telling people that their customer support is better than Jetlite, Kingfisher, Indigo, Goair.
You can see screen shot below: