This is a good topic.
Over the last one year or so, I find myself moving more towards the view that removing statistics against Bangladesh and Zimbabwe, especially Bangladesh is silly.
The reason for that is, cricket is not a black and white sport. There are lot of things which do not follow strict logic and rules. Take Virender Sehwag's record against Bangladesh. Here is a batsman who is considered a butcher, one of the best opening batsmen, has scored runs against everyone..his only weakness seem to be the bouncy wickets or the ball moving around. Neither does Bangladesh have a Dale Steyn nor do they have a Jame Anderson.
Yet Sehwag averages 35 against Bangladesh for whatever reason. If you're going to take out his stats against them, you are clearly manipulating them. If he does poorly against them because he does not take them seriously, then that should go against him as a cricketer. If he does poorly against them because Bangladesh bowl well to him, then credit should be given where its due. I have seen Masrafe get Sehwag out a couple of times with the moving ball. Yet you will never hear anyone mentioning that Sehwag could actually be outfoxed by a Bangladeshi bowler. Its blasphemy.
Now that Bangladesh is improving, this is getting even more ridiculous. Swann is considered the best spinner in the world. Over the last 2 years or so he has taken wickets consistently against all oppositions and outfoxed some of the best batsmen including Ponting, Kallis, Yousuf.
Yet you look at how well Tamim Iqbal played Swann in Bangladesh when England toured there..If people are going to ignore that just because "oh its Bangladesh" then they are just being stupid.
As I said before, things are not black and white in cricket and those who propose a blanket rule on taking out Bangladesh when observing stats do not realize that.
Pakistani batting sides over the last two years have at times been absolutely pathetic. I can argue that the wickets Anderson and Broad took against them last summer should be ignored because that batting order would not even make it to the Bangladesh test side..but then you wont find many supporters.
It is actually quite hypocritical. People will take take out stats when it suits them.. and include stats when it suits them.