Repeated attempts to force a change against consensus 
I have changed the text in the summary from "passive exposure to tobacco smoke increases risk of disease and disability" to "passive exposure to tobacco smoke causes death, disease and disability". I have done this after looking carefully at the four references (the text I used comes from reference 1) and also after reading the interesting discussion of this point on the talk page (see Passive smoking - Cause and association). I have also noted that my edit actually restored the consensus version which was in place since mid-November 2006, until one editor,  , started changing it on 30 January without any explanation, and has kept changing it since then, ignoring the fact that his changes were reverted by many editors. Here is a brief history of the edits done by 
 On January 30,  deletes in its entirety the sentence "Current scientific evidence shows that passive exposure to tobacco smoke causes death, disease and chronic illness leading to disability." No explnation is provided for the deletion. It is reverted by  a few moments later.  
 On January 31,   changes "causes death, disease and chronic illness leading to disability" to "increases risk of disease and chronic illness leading to disability and death" without explanation. This is reverted by [[User:86.194.76.177|86.194.76.177].
 On February 1,   changes twice "causes death, disease and chronic illness leading to disability" to "increases risk of disease and chronic illness leading to disability". This is reverted, first by  and then by 
 On February 2,  changes four times "causes death, disease and chronic illness leading to disability" to "increases risk of disease and chronic illness leading to disability", and, in another attempt, changes the whole phrase with "may be a health hazard". His changes are reverted by three editors  who takes it as vandalism, Dessources|Dessources and  , who asks  to "stop making this change. Next time "causes" becomes "increases risk", this goes to dispute". 
 On February 3,  repeats the same change twice, and is reverted by  and .
 Between February 4 and February 7,  has repeated the same change three times, one on each day, which have been reverted by ,  and by .

Although I am a newcomer to wikipedia, it would surprise me if this were acceptable practice. I think that  should accept the verdict of the other editors and stop making the same change. Please discuss.