Although I've done this and it works you are wrong since it does compromise the chain strength. Freewheel it's less of an issue but riding fixed, chain strength is far more important. As I've said again and again.. £10 for a new chain versus £2500 for teeth.. your call.
*If you are using a Shimano chain you can not push the same pin back through the inner and outer plates. Shimano rivets (pins) are beveled on each side for added strength. This is good in functionality until your chain breaks or you are sizing a new chain. Once the pin is pushed through it flattens out the bevel and weakens that link. For this reason your new Shimano chain will come with two chain pins. These pins include a guide portion and a replacement rivet. The image to the right shows a Shimano chain pin with the section having a rounded nose being the guide section. To use a Shimano pin insert the guide portion of the pin into the connected piece of the chain. You will now set this into the chain tool and press the replacement rivet into place. You can then snap off the guide portion of the pin with a pair of pliers. Shimano chain pins come in 8, 9, and 10-speed widths so be sure to purchase the correct on for your chain. *
Although I've done this and it works you are wrong since it does compromise the chain strength. Freewheel it's less of an issue but riding fixed, chain strength is far more important. As I've said again and again.. £10 for a new chain versus £2500 for teeth.. your call.
*If you are using a Shimano chain you can not push the same pin back through the inner and outer plates. Shimano rivets (pins) are beveled on each side for added strength. This is good in functionality until your chain breaks or you are sizing a new chain. Once the pin is pushed through it flattens out the bevel and weakens that link. For this reason your new Shimano chain will come with two chain pins. These pins include a guide portion and a replacement rivet. The image to the right shows a Shimano chain pin with the section having a rounded nose being the guide section. To use a Shimano pin insert the guide portion of the pin into the connected piece of the chain. You will now set this into the chain tool and press the replacement rivet into place. You can then snap off the guide portion of the pin with a pair of pliers. Shimano chain pins come in 8, 9, and 10-speed widths so be sure to purchase the correct on for your chain. *
http://www.bikeman.com/content/view/440/30/